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Home My WebLink About206-078Post Office Box 244027 Anchorage, AK 99524-4027 3800 Centerpoint Drive Suite 1400 Anchorage, AK 99503 Phone: (907) 564-4891 06/09/2025 Mr. Jack Lau Alaska Oil and Gas Conservation Commission 333 West 7th Avenue, Suite 100 Anchorage, Alaska 99501 Re: Prudhoe Bay Surface Casing by Conductor Annulus Top-offs of Cement, Corrosion Inhibitor through 06/09/2025. Dear Mr. Lau, Enclosed please find a copy of a spreadsheet with a list of Prudhoe Bay wells that were topped-off with cement, corrosion inhibitor in the surface casing by conductor annulus through 06/09/2025. Cement top-offs are executed as needed to mitigate the void space left at surface by minor cement fallback during the primary surface casing by conductor cement job. The remaining void space between the top of the cement and the top of the conductor is filled with a heavier than water corrosion inhibitor to reduce the risk of external surface casing corrosion. The attached spreadsheets include the well names, API and PTD numbers, treatment dates and volumes. As per previous agreement with the AOGCC, this letter and spreadsheet serve as notification that the treatments took place and meet the requirements of form 10-404 Report of Sundry Operations. If you have any additional questions, please contact me at 564-4891 or oliver.sternicki@hilcorp.com. Sincerely, Oliver Sternicki Well Integrity Supervisor Hilcorp North Slope, LLC Digitally signed by Oliver Sternicki (4525) DN: cn=Oliver Sternicki (4525) Date: 2025.06.09 14:30:46 - 08'00' Oliver Sternicki (4525) Hilcorp North Slope LLC.Surface Casing by Conductor Annulus Cement, Corrosion Inhibitor Top-offReport of Sundry Operations (10-404)06/09/2025Well NamePTD #API #Initial top of cement (ft)Vol. of cement pumped (gal)Final top of cement (ft)Cement top off date Corrosion inhibitor (gal)Corrosion inhibitor/ sealant dateF-10C21308650029204100365/29/25F-29B2111475002921627026.25/29/25F-33A20816350029226400145/29/25F-3619519650029226310035/29/25F-39190141500292210100175/29/25F-44A2051615002922130012.55/29/25F-47B21007950029222320215/29/25L-2512231065002923772001.8813/31/24117/29/24L-2532230485002923758004.1201.13/31/24127/29/24L-2542230305002923752003.8321.23/31/24137/29/24L-2922230255002923751003.3301.33/31/24147/29/24N-282141275002923524006.8504.711/19/242212/28/24N-302141245002923523003.5330.311/17/243.512/28/24PAVE1-122309450029237670019.910/27/24PWDW3-221908150029236340014.810/27/24S-40120607850029233130015.31130.511/15/24412/28/2415.31130.511/15/24S-401206078500292331300412/28/24 • Well Histo File Cover Pa e Image Pro~ect ry g XHVZE This page identifies those items that were not scanned during the initial production scanning phase. They are available in the original file, may be scanned during a special rescan activity or are viewable by direct inspection of the file. a Q!p -~~~ Well History File Identifier Organizing (done) ~ Two-sided III IIIIIIIIIII IIIII ^ Rescan Needed III IIIIII II I) III (II RE AN Color Items: ^ Greyscale Items: ^ Poor Quality Originals: ^ Other: DIG TAL DATA Diskettes, No. p`~,. ^ Other, No/Type: OVERSIZED (Scannable) ^ Maps: p Other Items Scannable by a Large Scanner OVERSIZED (Non-Scannable) ^ Logs of various kinds: NOTES: ^ Other:: BY: Maria Date: ~S~ fin III II~IIII~IN IIIII Pro~ect Proo g Maria Date: ° ~S~ ~ BY: ~---~ - ~7/~~loq I~ - - r ~ ~ ~ ~~ Scanning Preparation ~_ x 30 = a+ ~ I = TOTAL PAGES (Count does not include cover sheet) BY: Maria Date: Q ~S~ Production Scanning Stage 1 Page Count from Scanned File: ~~ (Count does include cover sheet) Page Count Matches Number in Scanning Pre aration: _~YES NO BY: Maria Date: ~ ~~ ~ /s/ ~ ~ ~ / ~ ~ Stage 1 If NO in stage 1, page(s) discrepancies were found: YES NO BY: Maria Date: ~S~ Scannin is complete at this point unless rescanning is required. III N~II~ ~I~II I~ II~ 9 ReScanned II I II ~I II I I III I I III BY: Maria Date: ~S~ Comments about this file: Quality Checked ~II II'lII III II'I III 10l6/2005 Well History File Cover Page.doc . r`~ .~, ~ ~~, ~ r .'+4' ~r~ ~~ .,~ NFL` ~' MICROFILMED 6/30/2010 DO NOT PLACE ANY NEW MATERIAL UNDER THLS PAGE.. C:\temp\Temporary Internet Files\OLK9\Microfilm Marker.doc z 3 J~~ DATA SUBMITTAL COMPLIANCE REPORT 6/22/2009 Permit to Drill 2060780 Well Name/No. PRUDHOE BAY UN UGN S-401 Operator BP EXPLORATION (ALASFCEy INC APi No, 5U-029-23313-00-00 MD 6566 ND 4036 Completion Date 6/23/2007 Completion Status WTRSP Current Status WTRSP UIC j REQUIRED INFORMATION Mud Log No Samples No Directional Survey es DATA INFORMATI~N Types Electric or Other Logs Run: MWD, GR, NEU, RES, DEN, CAL, USIT (data taken from Logs Portion of Master Well Data Maint Well Log Information: Log/ Electr Data Digital Dataset Log Log Run Interval OH / Type Med/Frmt Number Name Scale Media No Start Stop CH Received Comments D D Asc Directional Survey 0 6566 Open 12/18/2006 I pt Directional Survey 0 6566 Open 12/18/2006 ~ ~ ED D Asc Directional Survey 0 6490 Open 12/18/2006 PB 1 pt Directional Survey 0 6490 Open 12/18l2006 PB 1 i D C Lis 15164 ~Gamma Ray 108 6565 Open 5/31/2007 LIS Veri, GR, ROP, FET ~ w/Graphics (l,og 15164 Induction/Resistivity 2 Blu 108 6566 Open 5/31/2007 MD Vision Resisitivity 21- Oct-2006 ~og 15164 Induction/Resistivity 2 Blu 108 6566 Open 5/31/2007 TVD Vision Resisitivity 21- Oct-2006 ~ -~ED C Lis 15165'/amma Ray 108 6490 Open 5/31/2007 PB1 LIS Veri, GR, ROP, FET, RHO', DRHO, NPHI w/Graphics og 15165' Induction/Resistivity 2 Blu 108 6490 Open 5/31/2007 P61 MD Vision Service 21- Oct-2006 Log 15165 Induction/Resistivity 2 Bfu 108 6490 Open 5/31/2007 PB1 TVD Vision Service ! 21-Oct-2006 ' og Cement Evaluation 5 Col 1 4000 6362 Case 6/20/2007 SCMT, CCL, GR 11-June- 2007 ED C Lis 15295~ induction/Resistivity 108 6565 Open 7/25/2007 LIS Veri, GR, ROP, FET ~ REVISED w/Graphics PDS ~ and TIF ~ ~ DATA SUBMITTAL COMPLIANCE REPORT 6/2212009 Permit to Drill 2060780 Well Name/No. PRUDHOE BAY UN UGN S-401 Operator BP EXPlORATION (ALASK~y INC API No. 50-029-23313-00-00 MD 6566 TVD 4036 Completion Date 6/23/2007 Completion Status WTRSP Current Status WTRSP UIC Y ~'Log 15295 Induction/Resistivity 5 Blu 108 6566 Open 7/25/2007 MD REVISED Vison Resistivity 21-Od-2006 Log 15295 Induction/Resistivity 5 Blu 108 6566 Open 7/25/2007 ND REVISED Vison Resistivity 21-Od-2006 - D C Lis 15296~nduction/Resistivity 108 6489 Open 7/25/2007 P61 REVISED LIS Veri, GR, ROP, FET, DRHO, NPHI w/Graphics PDS and I~ TIF ' og 15296 Induction/Resistivity 5 Blu 108 6490 Open 7/25/2007 P61 MD REVISED Vison Service 8-Oct-2006 og 15296 Induction/Resistivity 5 Blu 108 6490 Open 7/25/2007 PB1 ND REVISED Vison ~ Service 8-Oct-2006 Well Cores/Samples Information: Sample Interval Set Name Start Stop Sent Received Number Comments ADDITIONAL II~ORMATION ~ N Well Cored? Y~ N Daily History Received? i d? "~'7N~ Chi R Formation To s ~ N ps ece ve p Analysis ~ N Received? Comments: Compliance Reviewed By: Date: ~ ~ • BP Exploration (Alaska) Inc. Attn: Well Integrity Coordinator, PRB-20 Post Office Box 196612 Anchorage, Alaska 99519-6612 June 25, 2009 aa~-0~~ Mr. Tom Maunder CJ ~~ d, Alaska Oil and Gas Conservation Commission 333 West 7th Avenue Anchorage, Alaska 99501 Subject: Corrosion Inhibitor Treatments of S-Pad Dear Mr. Maunder, ~ ~~`~ ~~~~ ~ ~. ~`. ~_ _ < < _. =. ~ ~::;_. ! .s-,_ ~~ L=~:~ JUL ,~ ~. 2009 r~!~~~'~ ~!' ~t ~~;~ ~i7C~ee rQe„it~iErs~'~r ~t?~i~~~ti ~~ Enclosed please find a spreadsheet with a list of wells from S-Pad that were treated with corrosion inhibitor in the surface casing by conductor annulus. The corrosion inhibitor is engineered to prevent water from entering the annular space and causing external corrosion that could result in a surface casing leak to atmosphere. The attached spreadsheet represents the well name, top of cement depth prior to filling and volumes of corrosion inhibitor used in each conductor. As per previous agreement with the AOGCC, this letter and spreadsheet serve as notification that the treatments took place and meet the requirements of forrn 10-404, Report of Sundry Operations. If you require any additional information, please contact me or my altemate, Anna Dube, at 659-5102. Sincerely, Torin Roschinger BPXA, Well Integrity Coordinator ~ ~ ~ BP Exploration (Alaska ) Inc. Surface Casing by Conductor Annulus Cement, Corrosion inhibitor, Sealant Top-off Report ot Sundry Oparations (10-404) S-pad Date 6/25/2009 Well Name PTD R Initial rop of cement Vol. of cement um ed Final top of cement Cement rop off date Corrosion inhibitor Corrosion inhibirod sealant date fl bbls ft na al S-Oi8 1952020 025 NA 0.25 NA 2.6 5/30/2009 S-02A 1941090 025 NA 025 NA 1.7 5/25/2009 S-03 1811900 1325 NA 1325 NA 92.65 5/20/2009 5-04 1830790 0 NA 0 NA 0.9 5/25/2009 S-OSA 1951890 0 NA 0 NA 0.9 5/26J2009 S-06 1821650 0 NA 0 NA 0.9 5/26/2009 5-07A 1920980 0 NA 0 NA 0.9 5/262009 S-088 2010520 0 NA 0 NA 0.85 5/2712009 5-09 1821040 1.5 NA 1.5 NA 9.4 5/31/2009 S-i0A 1917230 0.5 NA 0.5 NA 3.a 5/31/2009 S-178 1990530 025 NA 025 NA 1.7 5/27/2009 S-12A 1851930 025 NA 025 NA 7.7 6/1/2009 5-13 1821350 8 NA 8 NA 55.3 6l1l2009 S-15 1840170 025 NA 025 NA 3 6/2/2009 S-17C 2020070 025 NA 025 NA 2.6 6/7/2009 S-78A 2027630 0.5 NA 0.5 NA 3 6/2/2009 S-19 1861160 0.75 NA 0.75 NA 22 5/79/2009 5-20A 2010450 025 NA ~ 025 NA 1.3 5/79/2009 S-21 1900470 0.5 NA 0.5 NA 3.4 5/25/2009 S-22B 1970510 0.75 NA 0.75 NA 3 5/19l2009 S-23 1901270 0.25 NA 025 NA 1.7 5/25/2009 S-248 2031630 0.5 NA 0.5 NA 2.6 5/25l2009 S-25A 1982140 0.5 NA 0.5 NA 2.6 5/25/2009 S•26 1900580 0.75 NA 0.75 NA 3.4 5/26I2009 S-2~8 2031680 0.5 NA 0.5 NA 2.6 5/31I2009 S-2B8 2030020 D.5 NA 0.5 NA 2.6 5/31/2009 S-29A1t 1960120 0 NA 0 NA 0.85 5/27/2009 S30 1900660 0.5 NA 0.5 NA 5.1 5/31/2009 S-37A 1982200 0.5 NA 0.5 NA 3.4 5/26/2009 5-32 1901490 0.5 NA 0.5 NA 3.4 5/31l2009 S-33 /921020 0.5 NA 0.5 NA 4.3 5/26/2009 S-34 1921360 0.5 NA 0.5 NA 3.4 5/31/2009 S35 1921480 0 NA 0 NA .BS in 5/31/2009 ~ 5-36 1921160 0.75 NA 0.75 NA 4.25 5/27/2009 5-37 1920990 125 NA 125 NA 11.9 5/27I2009 S-3a 1921270 0.25 NA 025 NA 10.2 5/27/2009 S-at 1960240 1.5 NA 1.5 NA 11.1 5/30/2009 5-42 1960540 0 NA 0 NA 0.9 5/30/2009 S-43 1970530 ~ 0.5 NA 0.5 NA 1.7 5/28J2009 S-44 1970070 025 NA 025 NA 1.7 5/28/2009 5-100 2000780 2 NA 2 NA 27.3 5/29/2009 S-t01 2001150 125 NA 125 NA ~t.s 5/29/2009 5-~02L1 2031560 125 NA 125 NA 7~.7 5/37/2009 S-103 2001680 1.5 NA 1.5 NA 11.9 5/18/2009 S-104 2001960 1 J5 NA 7.75 NA 15.3 5/20/2009 S-105 2001520 4 NA 4 NA 327 5/20/2009 S-tos 2010120 1625 NA 7625 NA 174.3 6/2/2009 S-107 2011130 225 NA 2.25 NA 28.9 5/78/2009 S-toe 2011000 3.5 NA 3.5 NA 40 5/30/2009 S-109 2022450 2 NA 2 NA 21.3 5/30/2009 S-110 2011290 71.75 NA 11.75 NA 98.6 5/30/2009 S-ttt 2050510 2 NA 2 NA 79.6 5/30/2009 5-7~2 2021350 0 NA 0 NA 0,5 5/30/2009 Sa73 2021430 175 NA 175 NA 22.1 5/18/2009 S-114A 2021980 1.25 NA 125 NA 102 5/30/2009 5-715 2022300 2.5 NA 2.5 NA 272 5/29/2009 5-716 2031810 1.5 NA 1.5 NA 13.s 5/28/2009 S-117 2030120 1.5 NA 1.5 NA 15.3 5/29/2009 S-7i8 2032000 5 NA 5 NA 76.5 5/28/2009 S-119 2041620 1 NA 1 NA 52 5/30/2009 S-120 2031980 5.5 NA 5.5 NA W.2 5/29/2009 S-t21 2060410 4.5 NA 4.5 NA 53.6 5/28/2009 5-722 2050810 3 NA 3 NA 21.3 5/29/2009 S-t23 2041370 1.5 NA 1.5 NA 20.4 5/26/2009 S-t24 2061360 7.75 NA 1.75 NA 11.9 5/26/2009 5-125 2070830 225 NA 225 NA 20.a 5/28/2009 5-126 20770970 125 NA 125 NA 15.3 6l1/2009 S-2oo 1972390 1.25 NA 1.25 NA ta.5 5/28/2009 5-201 2001840 0 NA 0 NA 0,85 6/19/2009 5-273A 2042730 2 NA 2 NA 13.6 5/29/2009 5-215 2021540 2 NA 2 NA 18.7 6/t/2009 5-216 2001970 4.75 NA 4.75 NA 51 5/29l2009 5-217 2070950 025 NA 025 NA 1.7 6/1/2009 5-400 2070740 2 NA 2 NA 9.4 5/28/2009 S-40t 2060780 16 NA 16 NA 99.5 6/2/2009 S-500 0 NA 0 NA 0.85 5/28/2009 ~ - STATE OF ALASKA ~~ ALAS~OIL AND GAS CONSERVATION COMMI ION ~~~~°~ r ~F ~.~~~ ~ `~ ZQU~ REPORT OF SUNDRY WELL OPERATION~,,,r,F~ ~,,;, ~~,_ , 1. Operations Abandon ~ Repair Well ~ Plug Perforations ~ Stimulate~~ t er ld °~'^~'° Performed: Alter Casing ~ Pull Tubing~ Perforate New Pool ~ Waiver~ Time Extension ~~"' ~~~ Change Approved Program ~ Operat. Shutdown ~ Perforate ~ Re-enter Suspended Well ~ 2. Operator BP Exploration (Alaska), Inc. 4. Current Well Class: 5. Permit to Drill Number: tvame: Development r Exploratory r 2os-o~so- 3. Address: P.O. Box 196612 Stratigraphic r Service ~~ 6. API Numbe~: Anchorage,AK 99519-6612 50-029-23313-00=00 7. KB Elevation (ft): 9. Well Name and Number: 64.58 RT ~ S-401 - 8. Property Designation: 10. Field/Pool(s): ADLO-028258 ~ PRUDHOE BAY Field/ UGNU UNDEF WTRSP Pool 11. Present Well Condition Summary: Total Depth measured 6566 _ feet Plugs (measured) None true vertical 4035.66 - feet Junk (measured) None Effective Depth measured 6476 ' feet true vertical 3964.99 ~ feet Casing Length Size MD TVD Burst Collapse Conductor 105' 20" 91.1# H-40 Surface - 105' Surface - 105' 1490 470 Surface 2323' 13-3/8" 68# L-80 Surtace - 2323' Surface - 1961' S020 2260 Production 1971' 9-5/S" 40# L-80 2323' - 4294' 1961' - 2572' 5750 3090 Liner 2411' 7" 26# L-80 4153' - 6564' 2522' - 4034' 7240 5410 Perforation depth: Measured depth: SEE ATTACHED - _ _ _ _ True Vertical depth: _ _ _ _ _ Tubing: (size, grade, and measured depth) 5-1/2" 17# L-80 SURFACE - 3725' 0 0 - Packers and SSSV (type and measured depth) BKR ZXP LINER TOP PKR 4153' BKR SC-1 GRAVEL PACK PKR 6067' BAKER FA-1 PKR 6422' 0 0 12. Stimulation or cement squeeze summary: Intervals treated (measured): Treatment descriptions including volumes used and final pressure: 13. Representative Daily Average Production or Injection Data Oil-Bbl Gas-Mcf Water-Bbl Casing Pressure Tubing pressure Prior to well operation: n/a Subsequent to operation: n/a 14. Attachments: 15. Well Class after proposed work: Copies of Logs and Surveys Run EXp101'1tOry ~ Development r Service I~" Daily Report of Well Operations X 16. Well Status after proposed work: X WTRSP Oil I- Gas r WAG r GINJ I~ WINJ r WDSPL I~ 17. I hereby certify that the foregoing is true and correct to the best of my knowledge. Sundry PJumber or N/A if C.O. Exempt: N/A Contact Gary Preble Printed Name Gary Preble Title Data Management Engineer Signature n 9 Date 6/27/2008 Form 10-404 Rev' ed 04/2006 v i ~~ ~'+ y~ , ~~~~ `~~~ ~`~ 1~~~ Submit Original Only ~`~fc~ S-401 206-078 PERF ATTACHMENT i Sw Name Operation Date Perf Operation Code Meas Depth Top Meas Depth Base Tvd Depth 'fop Tvd Depth Base S-401 6/18/07 PER 6,210. 6,300. 3,756.29 3,827.1 S-401 6/18/07 PER 6,320. 6,350. 3,842.8 3,866.32 S-401 6/18/07 PER 6,398. 6,415. 3,903.92 3,917.22 S-401 6/20/07 SL 6,176. 6,421. 3,729.55 3,921.92 AB ABANDONED PER PERF APF ADD PERF RPF REPERF BPP BRIDGE PLUG P ULLED SL SLOTTED LINER BPS BRIDGE PLUG SET SPR SAND PLUG REMOVED FCO FILL CLEAN OUT SPS SAND PLUG SET FIL FILL SQF SQUEEZE FAILED MIR MECHANICAL ISOLATED REMOVED SQZ SQUEEZE MIS MECHANICAL ISOLATED STC STRADDLE PACK, CLOSED MLK MECHANICAL LEAK STO STRADDLE PACK, OPEN OH OPEN HOLE ` J ~ ~ 5-401 BBLS 298 1 %KCL 300 HCL 5 METH 603 Total 07/23/07 ~ ~ " \ SG[~lunt6~rger Alaska Data & Consulting Services 2525 Gambell Street, Suite 400 Anchorage, AK 99503-2838 ATTN: Beth ~ ~~~~~~~~~~ a,~~~~. ~ ~p ~Q~i ~~i~}~~ t~i! ~'~, C~s ~`°c~n~. ~~mr~iu~i~~ 1~11~;~1CY""~'~ NO. 4339 _!1~ _~~,~ Company: State of Alaska ~` Alaska Oil 8 Gas Cons Comm Attn: Christine Mahnken '~ +S ~~ !~~ 333 West 7th Ave, Suite 100 Anchorage, AK 99501 ~ ( ~ a~ ~ Field: Prudhoe Bay e~ r.,i... rn W61! -4 ovu w 4 4 ---- -- ~ W-O~A 40012483 11106/05 ~ S-401 (REVISED) 40014121 OH EDIT MWD/LWD 10/21/06 2 ~ 5-401 PB1~~REVISED) 40014121 OH EDIT MWD/LWD 10/08/06 2 ~ C-17B 10715418 MCNL 08/10/04 1 L5-15 11626485 RST 05/12/07 1 1 N-95 11637129 RST 01/13107 1 ~ 15-38A 10715446 MCNL 12/11/04 ~ YLtASt AIiKN(JWLtUUt KGl.C11' I 6i JI1717117V IYI\L! RL 1 V1~1\II\V VI~G vv~ ~ ~.-...~. .... BP Exploration (Alaska) Inc. Petrotechnical Data Center LR2-1 900 E. Benson Bivd. Anchorage,Alaska 99508 Date Delivered: _ Alaska Data & Consulting Services 2525 Gambell Street, Suite 400 Anchorage, AK 99503-2838 ATTN: Beth Received by: ~~ ~ STATE OF ALASKA ~ ~ ~ ~ ~ ~~~ ~ ALASKA IL AND GAS CONSERVATION COM~~SION ~ ~( ~.„,~„ ~a WELL COMPLETION OR RECOMPLETION REPORT AND LOG ~/~' `'' ~ 2 ~ p 7 1a. Well Status: ^ Oil ^ Gas Plu ed ^ Abandoned ^ Suspended ~~ ~ .~~ z czs.L~p~zo~,o ~~ ^ GINJ ^ WINJ I^ WAG ~~ No. of C~ lefion~ One 1b. Well Class ~Y;;~;~;~,~~ -~ ^ Development ~~xploratory ~ Service ^ Stratigraphic 2. Operator Name: 0?~7 BP Exploration (Alaska) Inc. 5. Date Comp., Susp., or Aba ~ 6/23/2007 '~ 12. Permit to Drill Number 206-078 307-178 3. Address: P.O. Box 196612, Anchorage, Alaska 99519-6612 6. Date Spudded ~ 9/1 2006 ~~6~ 13. API Number 50-029-23313-00-00 4a. Location of Well (Governmental Section): Surface: ' ' ~ 7. Date T.D. Reached 10/21/2006'~ 14. Well Name and Number: PBU S-401 4167 FSL, 4503 FEL, SEC. 35, T12N, R12E, UM Top of Productive Horizon: 1523' FSL, 2439' FEL, SEC. 27, T12N, R12E, UM 8. KB (ft above MSL): 64.58' ' Ground (ft MSL): 36.1' 15. Field / Pool(s): Prudhoe Bay Field / Ugnu Total Depth: 1764' FSL, 2524' FEL, SEC. 27, T12N, R12E, UM 9. Plug Back Depth (MD+~/D) 6476 3965 4b. Location of Well (State Base Plane Coordinates, NAD 27): Surface: x- 618930 ~ y- 5980370' Zone- ASP4 10. Total Depth (MD+~/D) 6566 ~ 4036 16. Property Designation: ADL 028258 - TPI: x- 615670 y- 5982956 Zone- ASP4 Total Depth: x- 615580 y- 5983195 Zone- ASP4 11. SSSV DeN A(MD+ND) 17. Land Use Permit: 18. Directional Survey ~ Yes ^ No Submit electronic and rinted information er 20 AAC 25.050 19. Water depth, if offshore N/A ft MSL 20. Thickness of Permafrost (TVD): 1900' (Approx.) 21. Logs Obtained (List all logs here and submit electronic and printed information per 20 AAC 25.071): MWD, GR, NEU, RES, DEN, CAL, USIT 22. CASING, LINER AND CEMENTING RECORD CASING SE'FTING QEPTH MD SETTING DEPTH ND HOLE ~MOUNT' WT..PER FL ` GRADE TOP ' BOITOM ' 'TOP BOTTOM SRE GEMENTING RECORD i PULLED' 20" 1 1.5# X-56 Surface 105' SurFace 105' Driven 260 sx Arctic Set A rox. 13-3/8" x 9-5/8" 68# x 40# x 47# L-80 29' 4295' 29' 2573' 16" 1099 sx AS Lite 1089 sx Class 'G' 7" 29# L-80 4152' 6563' 2522' 4033' 8-1/2" 343 sx Class'G' 23. Open to production or inject ion? ~ Yes ^ No 24: TueiNC R~co~o If Yes, list each i (MD+ND of Top & Bottom; Pe nterval open rforation Size and Number): Size DePrH SeT MD PACKER SET MD 4.72" Gun Diameter 21 spf 7", 26# x 5-1 /2", 17#, L-80 3831' None MD TVD MD TVD Gravel Pack Assembly 6067' - 6425' 6067' & 6422' 6210' - 6300'~ 3756' - 3827' 6320' - 6350' ~ 3843' - 3866' 25. Ac~a, FRacrua~, CEMEMT SQtJEEZE; Erc. 6398' - 6415~ / 3904~ - 391 T DEPTH (NTERVAL MD AMOUNT & KIND OF MATERIAL USED Freeze Protected with 80 Bbls of Diesel 26. PRODUCTION TEST Date First Production: Not on Production Yet (Water Source Well) Method of Operation (Flowing, Gas Lift, etc.): N/A Date of Test: Hours Tested: PROOUC-r~or, FoR TEST PERIOD OIL-BBL: GAS-MCF: WATER-BBL: CHOKE SIZE: GAS-OI~ RATIO: Flow Tubing Press. Casing Press: Ca,~cuiarE~ 24-HouR RaTe~ OIL-BBL: GAS-MCF: WATER-BBL: OIL GRAVITY-API ~CORR~: 27. CORE DATA Conventional Core(s) Acquired? ^ Yes ~ No Sidewal l Core s Ac uired? ~ Yes ^ No If Yes to either question, list formations and intervals cored (MD+TVD of top and bottom of each), and summarize lithology and presence of oil, gas or water (submit separate sheets with this form, if needed). Submit detailed descriptions, core chips, photographs and laboratory anal ' 20 AAC 250.071. 60~A~'LET(OiY See Attached Report T~BDINiS BFL auc ~ o?DD7 ~ s~ . _ :_. _,, :~ ~<ct~ ;s~;~s. Cammissian Form 10-407 Revised 02/2007 CONTINUED ON REVERSE SIDE r t~~Rl~~[~~~.. ~ Z8. GEOLOGIC MARKERS ~LIST ALL FORMATIONS AN ERS ENCOUNTERED~: Z9. FORMATION TESTS NAME ND Well Teste . ^ Yes ~ No Permafrost Top 36' 2g~ If yes, list intervals and formations tested, briefly summarizing test results. Attach separate sheets to this form, if needed, and submit Permafrost Base 2243' 1928' detailed test information per 20 AAC 25.071. SV5 3218' 2229' None SV4 3812' 2401' SV3 4957' 2871' SV2 5208' 3011' SV1 5674' 3336' Top of Ugnu 6104' 3673' Ugnu 4A 6154' 3712' Formation at Total Depth (Name): Ugnu 4A 6154' 3712' 30. List of Attachments: Summary of Daily Drilling Reports, Well Schematic Diagram, Surveys, Leak-Off Test Summary, Sidewall Core Summa 31. I hereby certify that the foregoing is true and correct to the best of my knowledge. Signed Terrie Hubble ~ Title Technical Assistant Date ~~ ~ ~ PBU S-401 206-078 307-178 Prepared By Name/lvumber.~ Terrie Hubble, 564-4628 Well Number Permit No. / A fOV81 NO. Drilling Engineer: phil Smith, 564-4897 INSTRUCTIONS GeNew-~: This form is designed for submitting a complete and correct well completion report and log on all types of lands and leases in Alaska. Submit a well schematic diagram with each 10-407 well completion report and 10-404 well sundry report when the downhole well design is changed. IreM 1a: Classification of Service Wells: Gas Injection, Water Injection, Water-Alternating-Gas Injection, Salt Water Disposal, Water Supply for Injection, Observation, or Other. Multiple completion is defined as a well producing from more than one pool with production from each pool complete~y segregated. Each segregated pool is a completion. ITenn 4b: TPI (Top of Producing Interval). ITeM 8: The Kelly Bushing and Ground Level elevation in feet above mean sea level. Use same as reference for depth measurements given in other spaces on this form and in any attachments. IreM 13: The API number reported to AOGCC must be 14 digits (ex: 50-029-20123-00-00). ITeM 20: Report true vertical thickness of permafrost in Box 20. Provide MD and TVD for the top and base of permafrost in Box 28. ITeM 22: Attached supplemental records for this well should show the details of any multiple stage cementing and the location of the cementing tool. IreM 23: If this well is completed for separate production from more than one interval (multiple completion), so state in item 1, and in item 23 show the producing intervals for only the interval reported in item 26. (Submit a separate form for each additional interval to be separately produced, showing the data peRinent to such interval). IreM 26: Method of Operation: Flowing, Gas Lift, Rod Pump, Hydraulic Pump, Submersible, Water Injection, Gas Injection, Shut-In, or Other (explain). ITeM 27: Provide a listing of intervals cored and the corresponding formations, and a brief description in this box. Submit detailed description and analytical laboratory information required by 20 AAC 25.071. IreM 29: Provide a listing of intervals tested and the corresponding formation, and a brief summary in this box. Submit detailed test and analytical laboratory information required by 20 AAC 25.071. Form 10-407 Revised 02/2007 Submit Original Only ! ~ 5-401 Coring Objectives and Results Sidewall cores were taken in 5-401 for grain size distribution data to aid in source water well completion design. 42 sidewall cores were recovered (45 were shot) in the SV3 to UG4A interval of 5-401 (5000'MD - 6400'MD). The attached spreadsheet, 5-401 Sidewall Core desc_v2.xls, illustrates core sample points, recovery and distribution. No porosity or permeability analyses were run on any of the samples. Grainsize and sample texture were the primary focus of the study. The cores were divided into 3 sets for various grainsize, screen tests and petrographic analysis. About 1/3~ of the samples were examined on location, and then transferred to the Prudhoe Bay lab for Sieve analysis. One third of the cores were sent to CoreLab for laser particle size analysis (LPSA). LPSA results are summarized in LPSA_S-401.x1s. Splits of these cores were forwarded for petrographic analysis. The remaining 1/3 were subjected to specific screen tests designed to aid in expandable screen completion planning. LPSA data is attached. Petrographic analysis was used primarily to confirm LPSA results. In general petrographic grainsize determinations supported those determined by LPSA. However, on some of the sand samples the very fine grained end of the LPSA distribution was often found to be due to sample pulverization during coring, and pulverization of lithic grains during the LPSA procedure. The results of these analysis has led to cessation of the use of expandable screen completions at this time in favor of cased hole gravel pack completions for sand production control in source water wells. ~ Attached files: 5-401 Sidewall Core desc v2.xls LPSA S-401.x1s N G 0 a U N ~ m O U F 3 a N r O ~ ~ c c c c a O o c ~ ~ o a O ~ c 3a N cn on -° d N ca oa a o N cn on ° N n a ~p T C N >~ma od"a -° N ~, ~~~m Eo~" N n N °~n `on N cn L c m >. c m rn c m y ~. m ~ S S m u~ >. a~ 2: $ c m on c~o rn N O N ~ y U .. Ul ] !q .. N ~ 41 S tn 1 fA U N ~ ~ U .. fn ~ .. .. Vl ~ . ~ N Z' ~ N~ N~ N 0 d ~ 0 N ~ N ~ L~ a~ ,o ~>. ~ ~o o~ a~ ~~ o0 a N ~o 00 ~ M ~ ~ 0~ a x N ~ ~i o~ ~ x ~o o~ a ~ ~- + J O N E N~ O A N~ N~ N~ N~ d ~ N._. C o y c ~ E x~ X mF U ~ X `m~ ~ X J m~ E ~'D m a~ ~-O ~ a~ O N~ ~H=o ~ ~ ~ U d o - ~ M o~ N ~ N rn N 'o~ o ^ o~ ~ rn ~ rn -o E tj m ~ C p ~ o ~ ~ 1 ~ a ~ _ 7 ~ 'O > > U c N ~ ~ > N~ ~ > > ~ N~ a 2' o (0 ~ ~ Z' ~ N"O "' ~ ~ ~ U Y 7 c0 ~ N O~ N O " O uf O " ~ rn p o ' O p pl ' Y ~ 1. v1 Of o _ Y 0 N O o ' ~ ~ ~..~~ ~ C 0 7 y ~ CJ ~ ` 2• ... m ~ ~ ~` ` 2• ... OIO ~ C Z•V ..`• m~ ~ `D ~~ o N ~ `~N ~~r o C V "~ Y ~ O ~ S O Y UD j, Y O U~N Y U~o ~ UOo U ~ U~o ~~ U_o C N(U N ~ 7 ~ ~ C N C> ~ ~ (0 L U tN ~~ ~ (Q L LN. ~ V ~ t (D L ~t`{ N~ i <p C C ~ f.~ N(~O r ! ~ ~'~ N ! C ~ lU L~ C O U~(0 U o 7 U O C'~ .~.. M O N o ~ U O U.. CO 7 U d.~. ~ ~ L~ O U~ y tp ~ 7 L~ O U> ~ ~ L~ Q U~ N ] p _ C ~ C _ C _ C _ C _ C _ C m (0 ~ ~ O N O N U U U U U U U U U U U T ~ U U U U U U U ~ U U ~ ~ ~ ~ ~ ~ N Q ~ ~ ~ Q ~ ~ C W ~ U ° O ~ N V 'n V N V ~ V O O a 6 ' ' ': . 0 `0 1 rg : ^:~ : a d ~ N a w c a ~s ~ ~ es 0 ~ ue ad 6 ]~ N ~ N C .~ W C7 ; -.:-a;re :4 „~_ ~ i N ils I~ ~ C u ' ~ '- V V V V N V ln V T m O U a E m J rn y ~ ~ O~ '` OJ '` T Z' O1 u l0 2' O~ u Z` Oi l0 r L J N N - f~ N N C N fA !~ rn 0 0 z J ~ ~ R ~ ~ O ~ ~ ~ O O~i n _ m Q ~ t9 t7 ~7 C9 (9 (7 (7 ..~.. SJ .~-, Vl N O 1~ O r ]T ~ ~i ~ Q 9 ~ : 3[ ~ p 7 _ CJ r+~ O~ i ~ ~ . O .-. - _ V C. _ 7 i 7L ~ - ~ .-. C.l '~f ^ O i ~ ~ _ ,> p~ `~ ~ U N'~ - ~ ZL ~ - 0 .~ .. CJ ~ T- ~ ~. O O~ ! ~. U 00 ^r _ ~ ~. - O [~ / ~ . u 00 Y~~, ~ 0~ ~ . ~ ~ ~ 00 I 3v, ,. _ O` "I 3v, ~ ~ O~ I 3v, _ I :~ r; 3,c= ._ l ;~ -r N- ~ 3.0_ N :, ., ~p M-- '.~o_ 00 .J T iO M-, 3,0~ y ~ - a, ~v_ ~ v - a - ~ a - ~a - ~ v ~a - ~ v v - ~ v '~ _ ~ v 'O - ~ ~ BP Alaska File No. : HOU-061026 S-401 Date : Oct 20, 2006 Prudhoe Bay, Alaska API No. : Analysts : JA, IM PARTSIZSM ANALYS/S SMPL DEPTH Kair MEAN NO (ft) (mD)* (~.~) LITHOLOGY* zone 44 5001.00 411.00 70 Sd vfg sshy SV3 43 5025.00 247.00 61 Sd vfg sshy SV3 41 5065.00 36.40 39 Silt shy SV3 39 5300.00 1170.00 122 Sd f-vfg cln SV2 36 5398.00 72.60 46 Sd vf-silt shy SV2 34 5490.00 242.00 63 Sd vfg sshy SV2 32 5585.00 0.53 18 Shale SV2 31 5692.00 1070.00 117 Sd f-vfg vsshy SV1 29 5720.00 362.00 72 Sd vfg sshy SV1 28 5770.00 77.60 51 Sd vf-silt shy SV1 26 5791.00 25.90 39 Silt shy SV1 23 5895.00 0.04 8 Shale SV1 21 5945.00 1.42 24 Silt vshy SV1 18 5966.00 506.00 105 Sd vf-fg sshy SV1 15 6175.00 8640.00 333 Sd mg cln UG4A 13 6201.00 3400.00 235 Sd m-fg vsshy UG4A 11 6225.00 391.00 89 Sd vf-fg sshy UG4A 8 6273.00 617.00 113 Sd f-vfg vsshy UG4A 2 6391.00 470.00 89 Sd vf-fg vsshy UG4A 1 6400.00 2.88 27 Silt vshy UG4A Footnotes: ' Lithology determined using laser particle size distribution. ~ M~rker MD i SV 3 4996 SV 2 5233 SV 1 5681 Ugnu 4 6103 Ugnu 4 6154 d10 d5 153 176 140 163 94 112 203 232 112 131 144 169 65 89 208 239 166 194 129 156 95 112 21 28 86 125 246 286 570 653 495 582 216 249 261 300 202 239 77 96 Page 1 of 1 Printed: 10/25/2006 10:02:49 AM ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 9/13/2006 18:00 - 21:00 3.00 MOB P PRE Break service lines from sub base to pits. Remove top drive from blocks and bridal up. Lower cattle chute. Rig down service lines on rig floor. Move pit complex from sub base. Install jeep under pit complex. Move sub base off of Z-19 and stage on pad. 21:00 - 00:00 3.00 MOB P PRE Move camp and pits from Z-19A to S-401. 3 Hours to split BOP stack in lieu of summer maint. for annual inspection. 9/14/2006 00:00 - 02:30 2.50 MOB P PRE Move camp and pits from Z-19A to S-401. 1 Hour to split BOP stack in lieu of summer maint. for annual inspection. 4 hours total time spent on splitting BOP while moving camp and pits to S-pad 02:30 - 13:00 10.50 MOB P PRE PJSM. Lay down derrick. Lay mats on Z-pad access road. Move sub base to S-pad. 13:00 - 19:00 6.00 RIGU P PRE PJSM. Prepare and inspect to raise derrick. Raise derrick and secure A-Leg pins. Bridal down. Hang bridal lines in derrick and secure. Pin blocks to top drive. Make up service line's on rig floor. Change out saver sub from 4" HT-40 to 4 1/2" IF. Rig up rig floor and handling tools. 19:00 - 00:00 5.00 RIGU P PRE Spread herculite. Nipple up diverter system on well S-401. Stage weil head equipment. Change liners in mud pumps to 6". 9/15/2006 00:00 - 09:00 9.00 RIGU P PRE Mobilize BOP from NOC yard after performing annual inspection. Assemble BOP and set back on BOP stand. Hang tree and riser in sub base. Berm up cellar area. 09:00 - 15:30 6.50 RIGU P PRE Spot sub base over S-401. Spot mud pits. Hook up service lines. Finish nippling up diverter line. Rig up 20" riser. load pipe shed with drill pipe and strap same. Rig accepted at 09:00 hours 15:30 - 21:30 6.00 RIGU P PRE Pick up 117 joints of 5" drill pipe and stand back in derrick. Pick up 17 joints of 5" HWDP and Jar. Stand back in derrick. 21:30 - 22:00 0.50 RIGU P PRE Pre spud HSE meeting with all personal involed. 22:00 - 23:00 1.00 DIVRTR P SURF Function test diverter knife valve and bag. Perform koomey test. Test wittnessed by WSL Wade Frame, Nabors Tool Pusher Biff Perry. W ittness waived by AOGGC rep Chuck Sheave. 23:00 - 23:30 0.50 RIGU P PRE Adjust brakes on draw works. 23:30 - 00:00 0.50 RIGU P PRE Mobilize cross overs and handling equipment to rig floor. Pick up Schlumberger 2.12 degree XP motor. 9/16/2006 00:00 - 01:30 1.50 RIGU N PRE Mobilize 9 5/8" rig tong heads from Rig 9es. 01:30 - 02:30 1.00 DRILL P SURF MU BHA #1 16" bit, 2.12 deg 9-5/8" motor, XO, 1 stand 5" HWDP. 02:30 - 03:00 0.50 DRILL P SURF Fill hole and check circulating system for leaks. Clean out to base of 20" at 110'. Spud the well drilling to 128'. 325 gpm 185 psi. 20 RPM. 03:00 - 06:00 3.00 DRILL P SURF Make up BHA. NM LDC , NM STB , MWD , UBHO, NM STB. Pick up 1 stand 5" HWDP. Unable to circulate. Stand back HW DP. Lay down NM lead collar and wash 20' of fill to 128' 06:00 - 07:00 1.00 DRILL P SURF Rig up Gyro Data. ', 07:00 - 08:00 1.00 DRILL P SURF Continue to M/U BHA #1 X-O, NM Lead Collar. I 08:00 - 09:00 1.00 DRILL P SURF Warm up Gyro Tool and Survey at 72'. Printed: 10/25/2006 70:02:55 AM ! ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 9/16/2006 09:00 - 10:00 1.00 DRILL P SURF Directional drill from 128' to 196'. 400 gpm 500 psi. Tq off .6k on .9k. Up wt 43k, S/O wt. Stand back HWDP. ART =.26 Hrs AST =.39 Hrs ADT =.65 Hrs Jar Hrs =.65 10:00 - 10:30 Q.50 DRILL P SURF Finisnh picking up BHA #1 NM DC, NM STAB, NM DC 10:30 - 12:00 1.50 DRILL P SURF Change out Gyro tools and Check shot with Gryo 98' back from bit at 98'. 12:00 - 18:00 6.00 DRILL P SURF Directional drill from 196' to 449'. 450 gpm 600 psi. 30 RPM, Tq off 1 k on 1.5k. Up wt 50k, S/O wt. 52k, ROT wt. 50k, W OB 3 to 5k. Mud wt. In 8.8 ppg. Out 8.8 ppg. Gyro every 100' drilled. Partial returns lost from 270' to 360'. Losing 210 bbl of Spud mud. No broaching encountered. ART =.95 Hrs AST = 2.33 Hrs ADT = 3.28 Hrs Jar Hrs = 3.93 18:00 - 20:00 2.00 DRILL P SURF Circulate bottoms up. Pull out of the hole standing back BHA #1 (2.12 XP Motor not yielding dog legs) 20:00 - 20:30 0.50 DRILL P SURF Check bit. Adjust bend in motor from 2.12 to 2.60 degree. 21:00 - 21:30 0.50 DRILL P SURF Run in the hole with BHA #2 21:30 - 00:00 2.50 DRILL P SURF Directional drill from 449' to 628'. 475 gpm 560 psi off 675 psi on. 30 RPM, Tq off 1 k on 3k. Up wt 60k, S/O wt. 58k, ROT wt. 60k, WOB 5 to 7k. Mud wt. In 8.8 ppg. Out 8.8 ppg. Gyro every 100' drilled ART =.4 Hrs AST =.5 Hrs ADT =.9 Hrs Jar Hrs = 4.83 9/17/2006 00:00 - 01:30 1.50 DRILL P SURF Pull out of the hole from 628' to 536'. Check shot with Gyro. 01:30 - 02:30 1.00 DRILL P SURF Pull out of the hole. Stand back BHA #2 02:30 - 03:30 1.00 DRILL P SURF Adjust bend in motor from 2.60 to 2.12 dgrees. Orient MWD. 03:30 - 04:00 0.50 DRILL P SURF Clean rig floor. 04:00 - 05:00 1.00 DRILL P SURF Run in the hole with BHA #3 to 602'. 05:00 - 11:30 6.50 DRILL P SURF Wash to bottom had 18' of fill. Directional drill 16" hole from 628' to 999'. Up wt. 75k, S/O wt. 68k, ROt wt. 65k, 480 gpm 850 spi off, 920 psi on. Tq 1.9k off, 3k on, WOB 15 to 20k. 30 RPM. ART =.79 Hrs AST = 2.84 Hrs ADT = 3.63 Hrs Jar Hrs 7.81 11:30 - 12:00 0.50 DRILL P SURF Rig down Gyro Data equipment. 12:00 - 13:00 1.00 DRILL P SURF Directional drill 16" hole from 999' to 1050'. Up wt. 75k, S/O wt. 68k, ROt wt. 65k, 480 gpm 850 spi off, 920 psi on. Tq 1.9k off, 3k on, WOB 15 to 20k. 30 RPM. ART =.0 Hrs AST =.6 Hrs ADT =.6 Hrs Jar Hrs 8.41 13:00 - 15:00 2.00 DRILL P SURF Pull out of the hole with BHA #3. Slight over pull of 25k at 800'. W ipe area free of futher obstructions. (2.12 degree motor not yeidling dog legs) MW 9 ppg in / out 15:00 - 16:30 1.50 DRILL P SURF lay down UBHO sub, MWD, NM Lead Collar, NM Stab. Break bit and lay down motor. 16:30 - 17:00 0.50 DRILL SURF Clean rig fllor. 16:30 - 18:30 2.00 DRILL P SURF PJSM. Make up Bit #1 RR #4, Adjust bend in motor to 2.60 degrees. Continue picking up BHA #4. MWD, NM Lead collar and NM Stab. Oreint MWD to Motor. 18:30 - 19:30 1.00 DRILL P SURF Run in the hole with BHA #4 to 1050'. 19:30 - 00:00 4.50 DRILL P SURF Directional drill 16" hole from 1050' to 1258'. Up wt. 80k, S/O wt. 70k, ROt wt. 70k, 520 gpm 1150 spi off, 1250 psi on. RPM 30, Tq 3k off, 6k on, WOB 25k. ART =.65 Hrs AST = 2.75 Hrs ADT = 3.40 Hrs Jar Hrs 11.81 Printed: 10/25/2006 10:02:55 AM ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 9/17/2006 ~ 19:30 - 00:00 I 4.50I DRILL I P I I SURF 91i 8/20~6 100:00 - 04:00 I 4.~0 f DRILL I P I 1 SURF 04:00 - 04:30 0.50 DRILL N DFAL SURF 04:30 - 06:30 2.00 DRILL N DFAL SURF 06:30 - 09:00 I 2.501 DRILL I N I DFAL I SURF 09:00 - 09:30 0.50 DRILL N DFAL SURF 09:30 - 11:30 2.00 DRILL N DFAL SURF 11:30 - 12:30 1.00 DRILL N DFAL SURF 12:30 - 23:30 11.00 DRILL P SURF 23:30 - 00:00 I 0.50I DRILL I P 9/19/2006 100:00 - 01:30 I 1.501 DRILL I P 01:30 - 02:00 02:00 - 03:30 03:30 - 06:30 0.50 DRILL N 1.50 DRILL N 3.00 DRILL N SURF SURF DFAL SURF DFAL SURF DFAL SURF Lost 201 bbls of Spud Mud While Drilling 16" Surface Hole in 24 hr Time Period. Directional drill 16" hole from 1050' to 1434'. Up wt. 88k, S/O wt. 70k, ROT wt. 73k, 639 gpm 1171 spi off, 1360 psi on. RPM 30, Tq 3k off, 5 to 6k on, WOB 25k. ART =.70 Hrs AST = 2.15 Hrs ADT = 2.85 Hrs Jar Hrs 14.66 Lost 20 bbl of Mud to Wellbore Motor giving no differential pressure and no reactive torque. Circulate bottoms up. Mud wt In 9.0 ppg. Out 9.0 ppg. Pull out of the hole with BHA #4 Bit #1 RR#4. Encountering 40k overpull at 1355'. Back reaming tight hole from 1354' to 1335' with 30 RPM, 370 gpm 470 psi. Encountering 25k overpulls at 868' and 768'. Back ream tight areas from 868' to 853' and from 768' to 763' with 30 RPM 370 gpm, 470 psi. Rack back HW DP, NM flex drill collars. Break bit, Lay down MW D, NM stab, NM lead collar, Break sleeve on motor and lay down. Drive Shaft Busted on Motor. C1ean rig floor. Make up BHA #5, Bit #2, Adjust bend in motor to 2.60 degrees, Pick up NM lead collar, NM stab, MWD, Orient MWD to motor. Run in the hole with BHA #5 Bit #2 to 1434'. Encountered no hole problems. No fill on bottom. Directional drill 16" hole from 1434' to 1916'. Up wt. 90k, S/O wt. 70k, ROT wt. 75k, 557 gpm 1090 psi off, 1370 psi on. RPM 30, Tq 3k off, 10k on, WOB 25k to 30k. Mud wt In 9.2 ppg. Out 9.2 pp9• ART =.75 Hrs AST = 9.52 Hrs ADT = 10.85 Hrs Jar Hrs 20.96 Lost 46 bbl of Mud to Welibore While drilling at 19i6' Continuous MWD inclination showed a dog leg severity of 7.86 degrees. Drilling was stopped. Stand back 1 stand of drill pipe and begin reaming the well bore from 1848' to 1817' to lower the dog leg severity. 30 RPM. 515 gpm 958 psi. Torque 4 to 5k. Continue reaming the well bore from 1848' to 1817' to lower the dog leg severity. 30 RPM. 515 gpm 958 psi. Torque 4 to 5k. Making a top drive connection at 1848' and continue reaming well bore from 1848' to 1915' several times. Once back on bottom at 1916' it was observed that motor was not giving any differential pressure and no reactive torque. Suspect Motor failure. Circulate bottoms up. Survey taken showed a 4.61 dog leg. Mud wt in 9.2 ppg. Out 9.2 ppg. Pull out of the hole with BHA #6. Rack back HWDP, NM flex drill collars. Break bit, Lay down MW D, NM stab, NM lead collar, Break sleeve on motor and lay down. No Visible Signs of Motor Failure Printed: 10/25/2006 10:02:55 AM s ~ Legai Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 9/19/2006 06:30 - 07:00 0.50 DRILL N DFAL SURF 07:00 - 09:30 2.50 DRILL N DFAL SURF 09:30 - 10:00 0.50 DRILL N DFAL SURF 10:00 - 13:00 3.00 DRILL N DFAL SURF 13:00 - 22:00 I 9.001 DRILL I P I I SURF Clean rig floor. Pick up BHA #6, Bit #2 RR #1, Adjust bend on motor to 2.38 degrees. Pick up NM lead collar, NM stab, MWD. Orient MWD to Motor. Change out MW D due stress cracks on box end. Run in the hole to 1848'. No problems. Wash to bottom from 1848' to 1916'. 536 gpm 1006 psi, Torque 5k, 30 RPM, Rot wt. 75k. Directionai drill 16" hole from 1916' to 2509'. Up wt. 90k, S/O wt. 70k, ROT wt. 75k, 606 gpm 1370 psi off, 1620 psi on. RPM 30, Tq 6k off, 8k on, WOB 30k. Mud wt In 9.2 ppg. Out 9.2 ppg. ART = 1.95 Hrs AST = 5.98 Hrs ADT = 7.88 Hrs Jar Hrs 39. 22:00 - 23:30 I 1.501 DRILL I P I I SURF 23:30 - 00:00 I 0.501 DRILL I P I 1 SURF 9/20/2006 00:00 - 02:00 2.00 DRILL P SURF 02:00 - 04:00 2.00 DRILL P SURF 04:00 - 04:30 0.50 DRILL P SURF 04:30 - 05:00 0.50 DRILL P SURF 05:00 - 07:00 2.00 DRILL N RREP SURF 07:00 - 09:00 2.00 DRILL P SURF 09:00 - 12:00 I 3.001 DRILL I P I I SURF 12:00 - 00:00 I 12.001 DRILL I P I I SURF 9/21/2006 ~ 00:00 - 10:30 I 10.50 ~ DRILL I P I I SURF 10:30 - 13:00 I 2.501 DRILL I P I I SURF 13:00 - 14:30 I 1.50I DRILL I P I I SURF 14:30 - 20:30 I 6.001 DRILL I P I I SURF Circulate 400 + Hi-Vis around at 650 gpm 1800 psi. 20% increase in cuttings once sweep got to surface. Cal stks. 7500. Actual 7900 stks. Mud wt. In 9.2 ppg. Out 9.2 ppg. Pull out of the hole.Tight hole at 2386' 40k overpull. Backream from 2386' to 2314'. 550 gpm 1200 psi. Continue to pull out of the hole. W ipe tight areas at 1657' to 1637', 1610' to 1594', 1577' to 1568'. Rack back HWDP, NM flex drill collars. Inspect bit. Adjust bend in motor from 2.38 to 1.50 degrees. Clean rig floor. Service top drive. Troubfe shoot and repair Elmago braking system. Run in the hole with BHA #7 Bit #2 to 2700'. Work thur tight areas from 2058' to 2094', 2225' to 2235'. Wash 60' to bottom. Directional drill 16" hole from 2509' to 2700'. Up wt. 90k, S/O wt. 60k, ROT wt. 75k, 606 gpm 1370 psi off, 1620 psi on. RPM 50, Tq 7k off, 89k on, WOB 30k. Mud wt In 92 ppg. Out 9.2 PP9• ART =.30 Hrs AST = 1.80 Hrs ADT = 2.10 Hrs Jar Hrs 35. Directional drill 16" hole from 2700' to 3454'. Up wt. 105k, S/O wt. 60k, ROT wt. 75k, 702 gpm 2080 psi off, 2310 psi on. RPM 80, Tq 7.5k off, 13k on, WOB 30 to 35k. Mud wt In 9.4 ppg. Out 9.4 ppg. ART = 5.62 Hrs AST = 223 Hrs ADT = 2.10 Hrs Jar Hrs 43 Directional drill 16" hole from 3454' to 3887'. Up wt. 110k, S/O wt. 60k, ROT wt. 75k, 702 gpm 2080 psi off, 2310 psi on. RPM 100, Tq 9k off, 13k on, WOB 20 to 30k. Mud wt In 9.4 ppg. Out 9.4 PP9• ART = 2.82 Hrs AST = 2.90 Hrs ADT = 5.72 Hrs Jar Hrs 48 Shaker screens blinding off. No Mud Losses to formation. Pull out of the hole from 3887' to 2034'. Encountering 25 to 30k over pulls at 2984', 3037', 3002'. 2584', 2104', 2075', wipe tight areas. Back ream from 3858' to 3818', 220 gpm 400 psi. Pick up 12 joints of 5" dp and run in the hole from the derrick to 3883'. No problems. Wash to bottom at 3887'. Directional drill 16" hole from 3887' to 4303'. Up wt. 120k, S/O wt. 55k, ROT wt. 80k, 715 gpm 1950 psi off, 2275 psi on. RPM 100, Tq 9k off, 13k on, WOB 20 to 30k. Mud wt In 9.0 ppg. Out 9.0 PP9• Printed: 10/25/2006 10:02:55 AM ! +i Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING 1 Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: ' 9/21 /2006 14:30 - 20:30 20:30 - 21:30 21:30 - 23:00 6.00 DRILL P SURF 1.00 DRILL P SURF 1.50 DRILL P SURF ART =.75 Hrs AST = 2.52 Hrs ADT = 327 Hrs Jar Hrs 52 Chage out entire mud system with new spud mud. Circulate bottoms up 713 gpm 2240 psi. Pull out of the hole from 4303' to 3268'. Encountering 25 to 30k over pulls at 4228', 4051', 4080'. 45k over puli at 4146'. Back ream tight areas that would not wipe away, 4288' to 4204', 4080' to 4007', 3976' to 3902'. 600 gpm 1700 psi. Run in the hole from 3268' to 4243'. Washing 60' to bottom. Circulate bottoms up at 710 gpm 2260 psi. No increase in cuttings. Continue to circulate 2 bottoms up at 710 gpm 2130 psi. Rotating and reciprocating pipe in 30' intervals. Mud wt. In 9.0 ppg. Out 9.0 ppg. No increase in cuttings. Pull out of the hole. No over pulls to speak of. Pump out of the hole from 1900' to 1700' due to swabbing. 126 gpm 350 psi. Rack back HWDP and Jar. Lay down NM flex dc, NM XO, NM lead collar, MW D, NM stab, 1.50 deg XP motor and bit. Note: Stabiiizers balled up with clay 3' above and below as well as the bit. Clean and clear rig floor. Make dummy run with 13 3/8" flutted hanger and landing joint. Rig up Nabors casing equipment. PJSM - Make up 9-5/8" Float equipment. BakerLok up to float collar. Fill pipe and check floats. OK. Run 9 joints of 47# L-80 IBT-M 9 5/8" Casing. Make up 9 5/8" x 13 3/8" Cross over to 412'. Make up torque on 9 5/8" 8800 to 9200 ft/Ib. Rig down 9 5/8" casing equipment and rig up 13 3/8" casing equipment. Run 13 3/8" 68# L-80 IBT-M casing from 412' to 2709'. Working thur tight spots from 2220' to 2709'. Up wt. 180k. S/O wt. 30k. Average Make up Torque 9000 to 10000 ft/Ib. Work 13 3/8" casing from 2709' to 2708' with no pipe movement. Working pipe from 275k to 30k. Break circulation. Circulate at 180 gpm 521 psi. Work 13 3/8" casing from 2709' to 2708' with no pipe movement. Working pipe from 400k to 5k. Circulate at various rates. Spot 50 bbl lube pill consisting of 8% Lube 776 and work pipe as moving pill up hole letting pill soak in various intervals. Release push plate and rig down franks tool. Lay down 1 full joint of 13 3/8" casing. Remove 350 ton elevators. Make up circulating swedge to 13 3/8" casing. Circulate 2.0 ppg over weighted mud sweep at 600 gpm 253 psi. Continue working pipe from 400k to 30k with no movement. Mud wt. In 9.0 ppg. Spot 30 bbl steel lube sweep on back side at 2300' and let soak. Continue working pipe from 400k to 30k with no movement. While mobilizing fishing tools. Set 13 3/8" casing in slips with 25k up wt. Remove long bails and install short bails. Make Bakers 11 3/4" Multi string cutter, 12 1/4" string stab, pup joint and cross over. Open blades with 140 psi and cut 13 3/8" casing 15' below rotary table. 2 to 3k Tq. 35 RPM. 23:00 - 23:30 0.50 DRILL P SURF 23:30 - 00:00 0.50 DRILL P SURF 9/22/2006 00:00 - 01:30 1.50 DRILL P SURF ' 01:30 - 06:00 4.50 DRILL P SURF I~ 06:00 - 10:00 4.00 DRILL P SURF ~ 10:00 - 10:30 0.50 DRILL P SURF 10:30 - 11<00 0.50 CASE P SURF 11:00 - 13:30 2.50 CASE P SURF 13:30 - 15:30 2.00 CASE P SURF 15:30 - 16:30 1.00 CASE P SURF 16:30 - 23:30 7.00 CASE P SURF 23:30 - 00:00 9/23/2006 I 00:00 - 11:00 0.501 CASE I N I STUC I SURF 11.00 ~ CASE ~ N ~ STUC I SURF 11:00 - 14:30 3.50 CASE N STUC SURF 14:30 - 17:00 2.50 CASE N STUC SURF 17:00 - 19:00 I 2.001 CASE I N I STUC I SURF 19:00 - 21:00 ~ 2.00 ~ CASE ~ N ~ STUC ~ SURF 21:00 - 22:30 ~ 1.50 ~ CASE ~ N ~ STUC ~ SURF Printed: 10/25/2006 10:02:55 AM ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING 1 Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 9/23/2006 22:30 - 00:00 1.50 CASE N STUC SURF Lay down 23.14' cut jt of 13 3/8" casing. Lay down Bakers 11 3/4" Multi string cutter assy. Clean and clear rig floor. 9/24/2006 00:00 - 02:00 2.00 CASE N STUC SURF Pick up BHA #9, Bull nose, 13 3/8" pack off, cross over sub, spear dressed at 12.55", spear extension, stop sub, surtace jars, cross over sub, 1 6 1/4" steel dc, 1 jt 5" HWDP. Adjust contriol ring on surface jars. 02:00 - 03:00 1.00 CASE N STUC SURF PJSM. Engage spear and commence jarring operations at 180k up. With no pipe movement. Circulate with no restrictions. 03:00 - 06:00 3.00 CASE N STUC SURF Inspect derrick for loose items after jarring. Release from spear. Lay down spear assembly. 06:00 - 10:00 4.00 CASE N STUC SURF Pick up Bakers Multi string cutter, break lower half and change out piston and blades, retorque multi string cutter, continue making up BHA #11, 12 1/4" string stab, 2 cross overs, Run in the hole from the derrick with 6 1/4" steel drill collar and 5" HWDP to 646'. 10:00 - 11 `.00 1.00 CASE P SURF PJSM. Slip and cut 80' of drilling line. 11:00 = 11:30 0.50 CASE P SURF Service top drive. Change oil filter and oil, clean y-strainer. 11:30 - 13:00 1.50 CASE N STUC SURF Run in the hole from 646' to 2192'. Fill pipe. ~ 13:00 - 14:30 1.50 CASE N STUC SURF Obtain parameters. Up wt. 80k, S/O wt. 70k, Rot wt. 75k, 113 ', gpm 860 psi, 35 rpm 4k tq. Locate 13 3/8" collar at 2172'. Cut ' 13 3/8" 68# L-80 IBT-M casing at 2192'. 14:30 - 16:00 1.50 CASE N STUC SURF Monitor well bore. Static. Pull out of the hole from 2192' to 646'. 16:00 - 18:00 2.00 CASE N STUC SURF Stand HWDP and 6 1/4" steel drill collars in derrick. Lay down cross overs and Bakers Multi string cutter. Clean rig floor. Inspection of blades showed wear to 14 3/4". 18:00 - 19:00 1.00 CASE N STUC SURF Pick up BHA #11, 4 1/2" bull nose, 13 3/8" pack off assy, cross over, spear dressed with a 12.55" grapple, spear extension, stop sub, Bowan surface jars, (1) 5" HWDP. 19:00 - 20:30 1.50 CASE N STUC SURF Engauge 13 3/8" 68# L-80 IBT-M casing 15' below rotary table. ' Break circulation 486 gpm 280 psi. Pump 35 bbls 2 ppg over weighted mud sweep. Pick up to 300k. Surface jars not working. Release spear. Pull up and adjust control ring on surface jar. Pick up and place (1) 6 1/4" steel drill collar below HW DP for added weight to assit in closing surface jar. Engauge 13 3/8" casing and attempt to fire surface jars. Two more attempts were made to utilize surface jars by adjusting control ring to no avail. Suspect pressure blocks in bowan surface jars failed. 20:30 - 22:30 2.00 CASE N STUC SURF Circulate 2 ppg weighted mud sweep from well bore Initially pumping at 615 gpm 386 psi. Reducing pump rate to 220 gpm 150 psi. Unable to keep mud from running over shale shakers. Circulated 683 bbls. Calculated hole volume from 13 3/8" casing shoe at 2709' 659 bbls. Did not notice an increase in mud wt. from weighted sweep. No increase in cuttings, Mud wt. In 9.1 ppg. Out 9.1 ppg. 22:30 - 00:00 1.50 CASE N STUC SURF Lay down BHA #11. 9/25/2006 00:00 - 01:00 1.00 CASE N STUC SURF Pick up BHA #12 Change blades in Bakers Multi string cutter, continue making up BHA #12, 12 1/4" string stab, 2 cross overs, Run in the from the derrick with 6 1/4" steel drill collars and 5" HWDP to 646'. 01:00 - 02:00 1.00 CASE N STUC SURF Run in the hole from 646' to 1545'. Printed: 10/25/2006 10:02:SS AM ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 9/25/2006 I 02:00 - 02:30 I 0.50 I CASE I N I STUC I SURF 02:30 - 04:00 I 1.50I CASE I N I STUC I SURF 04:00 - 05:00 1.00 CASE N STUC SURF 05:00 - 06:30 1.50 CASE N STUC SURF 06:30 - 07:00 I 0.50 I CASE I N I STUC I SURF 07:00 - 07:30 I 0.50I CASE I N I STUC I SURF 07:30 - 09:00 ~ 1.50 ~ CASE ~ N ~ STUC ~ SURF 09:00 - 16:30 I 7.501 CASE I N I STUC I SURF 16:30 - 18:00 1.50 CASE N STUC SURF 18:00 - 21:30 3.50 CASE N STUC SURF 21:30 - 22:30 1.00 CASE N STUC SURF 22:30 - 23:00 0.50 CASE N STUC SURF 23:00 - 00;00 1.00 CASE N STUC SURF 9/26/2006 00:00 - 01:30 1.50 CASE N STUC SURF 01:30 - 02:30 1.00 CASE N STUC SURF 02:30 - 04:00 1.50 CASE N STUC SURF 04:00 - 04:30 0.50 CASE N STUC SURF 04:30 - 06:00 1.50 CASE N STUC SURF Break circulation 56 gpm 318 psi, Locate 13 3/8" casing collar at 1578' DPM setting 5k down to verify. Shut down pumping and pick up to 1558'. Obtain parameters. Up wt. 75k, S/O wt. 70k, Rot wt. 75k, 176 gpm 727 psi, 35 rpm, 1 k tq off. 3 to 4k on. Cut 13 3/8" 68# L-80 IBT-M casing at 1558'. Mud wt. In 9.1 ppg. Out 9.1 ppg. Monitor well bore. Pull out of the hole from 1558' to 646'. Stand HWDP and 6 1/4" steel drill collars in derrick. Lay down cross overs and Bakers Multi string cutter. Clean rig floor. Pick up BHA #13, 4 1/2" bull nose, 13 3/8" pack off assy, cross over, spear dressed with a 12.55" grapple, spear extension, stop sub, (1) 5" HWDP. I Engauge 13 3/8" 68# L-80 IBT-M casing 15' below rotary table. Pull to 255k Up. wt. Fish free at 145k Up wt. ' PJSM. Rig up Nabors casing equipment. Lay down 18.45' cut joint of 13 3/8" casing with spear. Note: Cut joint with spear sent BOT for spear removal. Lay down 13 3/8" 68# L-80 IBT-M Casing. Recovering 37 full joints and a 22.92' cut off. Rig down Nabors casing equipment. Clean rig floor. PJSM. Pick up BHA #14, 4 1/2" bull nose; 13 3/8" pack off assy, cross over, spear dressed with a 12.55" grapple, spear extension, stop sub, (1) 5" drill pipe pup joint, bumper sub, oil jars, cross over, (9) 6 1/4" drill collars, cross over, intensifire, HWDP = 781'. Run in the hole from 781' to 1538' with no hole problems. Obtain parameters. Up wt. 85k. S/O wt. 75k. Wash down tc~ TOF at 1558'. 150 GPM 190 psi. Engauge fish at 1571'. Set jars off at 175k up wt. Pulled to 300k. Reset jars and jarred at 250k up wt. pullled to 300k with no movement. Reset jars and attempt to jar up. Appears that grapple slipped. Pull out of the hole from 1558' to 781'. Stand back HWDP, Lay down intensifire, Stand back drill collars. Inspect 12.55" grapple. Slips on grapple flat. Change out 12.55" grapple. Run in the hole with BHA #15. Run in the from 781' to 1538' Obtain parameters. Up wt. 85k. S/O wt. 75k. Wash down to TOF at 1558'. 150 GPM 190 psi. Engauge fish at 1571'. Set jars off at 175k up wt. Pulled to 300k. Reset jars and jarred at 250k up wt. pullled to 300k with no movement. Pump 35 bb! 2 ppg weighted lube sweep at 402 gpm 505 psi. Continue jarring at 250k to 275k and pulling to 300k. Pipe free at 110k Up wt. 06:00 - 08:00 2.00 CASE N STUC SURF 08:00 - 09:00 1.00 CASE N S7UC SURF 09:00 - 10:00 1.00 CASE N STUC SURF 10:00 - 12:00 2.00 CASE N STUC SURF 12:00 - 13:30 1.50 CASE N STUC SURF 13:30 - 19:30 I 6.001 CASE I N I STUC I SURF POH w/fish f/1528' to 780'. POH and stand back HWDP, drill collars, LD jars and pull fish to floor. RU to LD 13-3/8" casing. LD spear and 18.77' of top stub. LD 15 jts of 13-3/8" casing and 17.96' of bottom stub. Two bowspring centralizers out of hole. One left in hole. RD casing running equipment. Service top drive. Inspect derrick. Clean and clear rig floor. Printed: 10/25/2006 10:02:55 AM ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 9/26/2006 I 19:30 - 22:00 I 2.50I CASE I N I STUC I SURF 22:00 - 23:00 I 1.001 CASE I N I STUC I SURF 23:00 - 00:00 I 1.001 CASE I N I STUC I SURF 9/27/2006 I 00:00 - 00:30 I 0.501 CASE I N I STUC I SURF 00:30 - 01:00 0.50 CASE N STUC SURF 01:00 - 03:30 2.50 CASE N STUC SURF 03:30 - 04:30 1.00 CASE N STUC SURF 04:30 - 05:00 0.50 CASE N STUC SURF 05:00 - 11:30 I 6.501 CASE I N I STUC I SURF 11:30 - 14:30 3.00 CASE N STUC SURF 14:30 - 15:30 1.00 CASE N STUC SURF 15:30 - 16:00 0.50 CASE N STUC SURF 16:00 - 17:00 1.00 CASE N STUC SURF 17:00 - 17:30 0.50 CASE 17:30 - 19:00 1.50 CASE 19:00 - 21:30 2.50 CASE 21:30 - 00:00 2.50 CASE N N N N STUC ISURF STUC ISURF MU 780.86' of BHA # 16. 13-3/8" casing spear w/ bullose, 13-3/8" packoff cup, xover, ITCO spear, spear extension, 4.5" X 13.5" stop sub, 5" pup jt., 6.25" lub. bumper sub, 6.25" oil jar, xover, nine 6-3/8" drill collars, xover 6.25" intensifier, 5 jts HWDP. RIN to top of remaining fish at 2192'. No problems getting BHA to depth. Up wt. 90K, SO wt. 75K. Wash down last stand slowly and clean up to top of fish at 2192'. 430 gpm, 640 psi. See bull nose tag up at 2192'. Attempt to work packoff assembly into 13-3/8" casing. No clear indication that packoff engaged fish. Attempt to engage fish w/pumps on and off. PU and rotate pipe 1/2 turn. SO f/75K to 35K. Can not engage fish. Continue attempts to engage fish w/pumps and without pumps. 343 gpm, 413 psi. PU wt. 90K. No indication that packoff entered fish. CBU. 560 gpm, 840 psi. POH w/BHA # 16. LD BHA #16. Rubber pack off cup out of hole w/large chunk cut from sealing area w/imprint of top of fish in rubber indicating that cup had not completely entered fish. Grapple showed no signs of engaging fish. Rig team consulted w/town ODE and decision made to mobilize Gyrodata and Schlumberger wireline/directional personnel for sidetrack. Rig team consult w/town team and decisiorr made to mobilize BHA #17, 13-3/8" watermelon mill cleanout assy. to be followed w/spear w/packoff cup assyembly, BHA #18. PU of watermelon mill BHA # 17, w/7-3/4" OD bullnose, double pin sub, 12-1/4" watermellon mill, xover, 6-1/4" lub. bumper sub, 6-1/4" oil jars, xover, nine 6-3/8" drill collars, xover, 6-1/4" "Intensifire", 5 stds HWDP, BHA = 776.64' + 4415' dril! pipe to surface. RIH to top of fish at 2192'. Establish circulation through bullnose. Work watermelon mill f/2192' to 2194'. Circulate at 272 gpm, 315 psi, 22 rpm, 4K tq. 85K up wt., 70K SO wt. Reciprocate mill without rotating f/2192' to 2220' while circulating bottoms up. 599 gpm, 953 psi, 85K PU wt., 70K SO wt. Monitor well, blow down topdrive, and POH to top of BHA # 17. STUC SURF Lay down BHA# 17. Watermelon mill showing signs of contact w/top of fish at largest OD. Wear pattern on Cut-Rite evident. STUC SURF Hold PJSM w/all hands, service personnel, WSL on handling of grapple BHA #18. MU 13-3/8" spear assembly BHA# 18 w/7-3/4" bullnose, 12-1/4" string stabilizer (not run on 1st grapple run), xover, xover, 13-3/8" packoff cup assy., 9283 ITCO spear, 4.5" flex extension, 4.5" spear stop sub w/13-1/2" OD, 5" pup jt., 6-1/4" lub. bumper sub, 6-1/4" oil jar, xover, nine 6-3/8" drill collars, xover, 6-1/4" "Intensifire", 5 stands HWDP, 1398' drill pipe to surface. Printed: 10/25/2006 10:02:55 AM ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 IRig Name: NABORS 7ES Rig Number: 9/27/2006 21:30 - 00:00 2.50 CASE N STUC SURF 9/28/2006 00:00 - 02:30 2.50 CASE N STUC SURF 02:30 - 03:00 I 0.501 CASE I N I STUC I SURF 03:00 - 03:15 0.25 CASE N STUC SURF 03:15 - 05:30 2.25 CASE N STUC SURF 05:30 - 07:00 1.50 CASE N STUC SURF 07:00 - 07:30 0.50 CASE N STUC SURF 07:30 - 09:00 1.50 CASE N STUC SURF 09:00 - 11:30 2.50 CASE N STUC SURF 11:30 - 12:00 0.50 CASE N STUC SURF 12:00 - 14:30 2.50 CASE N STUC SURF 14:30 - 20:00 5.50 CASE N STUC SURF ', 20:00 - 00:00 4.00 CASE N STUC SURF '9/29/2006 00:00 - 01:00 1.00 CASE N STUC SURF ~~ 01:00 - 02:00 1.00 CASE P SURF 02:00 - 04:30 2.50 CASE N STUC SURF 04:30 - 05:30 1.00 CASE N STUC SURF 05:30 - 06:30 1.00 CASE N STUC SURF 06:30 - 08:00 1.50 CASE N STUC SURF 08:00 - 08:30 0.50 CASE N STUC SURF 08:30 - 10:30 2.00 CASE N STUC SURF RIH to top of fish at 2192'. Circulate every 500' and check for bullnose plugging. Up wt. 90K, SO uvt. 75K. Circulate above fish 145 gpm, 259 psi. Work pipe and circulate attempting to sting cup into fish. Sting in and see overpull to 100K#. Circulate 38 bbls of 11.2ppg lube pill around fish 130 gpm, 430 psi.~ Jar on fish. PU wt. 250K and trip jars. PU to 350K. Reset jars. 10 licks w/jars. Pull to 350K and see pipe come free. POH w/fish. Up wt. 130K. Mud wt. 9.2 ppg in and 11.0 ppg w/weighted pill coming out. Stand back HWDP. LD 6.375" drill collars. LD BHA to fish. Find part of 13-3/8" centralizer on top of fish. Found that cup was cut and 9-5/8" was plugged indicating that lube pill was not placed around fish but was circulated above fish. All of 13-3/8" recovered. 3 complete 13-3/8" centralizers recovered and 1/2 of 4th from total of 5 installed. PJSM w/all hands, casing hand, toolpusher, WSL on laydown of 13-3/8" casing. RU 13-3/8" casing running equipment. LD 2 jts 13-3/8" casing. LD 23J3' 13-3/8" casing stub. LD 13-3/8" pup jt, XO, and 9-5/8" pup jt. RU to handle 9-5/8" casing. LD 4 jts of 9-5/8" casing wet. Shoe track plugged. Use air to evacuate each jt. Continue to lay down 9-5/8" casing. LD 9-5/8" shoe track (Heat Baker-Loked jts). No damage evident on any of shoe track or 9-5/8" jt. beyond normal wear marks on low side f/RIH. Recover 5 more jts. of 9-5/8" for a total of 9 jts. (9 total run) and 9 centralizers (9 total run). Recovered, handled, marked 9-5/8" jt #8 w/RA pip tags in collar. Large amounts of viscous mud, clay lumps, sand, small rocks plug floor drains to flow line. RU super sucker to remove gravel/mud f/casing and from rig floor. RD casing running equipment, clear rig floor, clean out all plugged floor drains and piping to flow line, clean rig floor. Load pipe shed with 13-3/8". Continue cleaning rig floor and drains. Service top drive. Use super sucker to drain stack and perform function test on diverter. Test witnessed by BP WSL Loweli Anderson. PU BHA #19 w/12-1/4" Hughes MX-C1 re-run bit (jetted 3 x 18 & 1 x 12), 16" OD near bit stabilizer, 2 Schlumberger 30' x 8" NM drill collars, 16" NM stabilizer, NM Xover, three 6-9/16" OD NM spiral drill collars, floaUsaver sub, hyd. jars, 17 jts. 5" HWDP. (BHA = 706.49'). RIH w/5" drill pipe to 2200'. CBU at 2200'. 610 gpm, 1309 psi, PU wt. 90K, SO wt. 60K. RIH f/2200' to 2981'. 25K drag at 2810'. Circulate and work pipe f/2810' to 2981', 162 gpm, 330 psi, PU wt. 90 K, SO wt. 60K. CBU at 2981, 600 gpm, 1340 psi, 30 rpm, 5K tq., Rot. wt. 71 K, PU wt. 75K. Backream f/2981' to 2127', 600 gpm, 1340 psi, 30 rpm, 5K tq., Printed: 10/25/2006 10:02:55 AM ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 9/29/2006 08:30 - 10:30 10:30 - 11:30 11:30 - 12:30 12:30 - 13:00 13:00 - 14:00 14:00 - 15:30 2.00 CASE N 1.00 CASE N 1.00 CASE N 0.50 CASE N 1.00 CASE N 1.50 CASE N STUC SURF STUC SURF STUC SURF STUC SURF STUC SURF STUC SURF Rot. wt. 71 K, PU wt. 75K. RIH f/2127' to 3061'. 30K drag at 3061'. Circulate and work pipe f/2981' to 3171'. 162 gpm, 330 psi. PU wt. 90K, SO wt. 60K. Backream f/3265' to 2981', 30 rpm, 5K tq., Rot. wt. 7kOK, PU wt. 75K, 600 gpm, 1350 psi. RIH f/2981' to 3717'. Circulate 160 gpm, 1510 psi., and work pipe down f/3717' to 3925', 25K drag. Backream each stand f/3925' to 3642', 600 gpm, 1510 psi. PU wt 110K, SO wt. 55K, Rot. wt. 77K. RIH f/3925' to 4303', PU wt. 110, SO wt. 55K. Back ream f/4303' to 707'. 800 gpm, 2620 psi, 60 rpm, 8K tq., 75K rot. wt. Pump out of hole f/707' to 165', 400 gpm, 420 psi w/BHA #19, stand back HWDP and drill collars. Clean and check balled stabilizers and bit. OK. Diverter drill. Clean rig floor. PU and RIH w/BHA # 19. RIH w/drill pipe to 4303'. Set down at 1712'. PU. Break circulation, set down 10K# and drop through at 1712'. Set down at 4245'. PU, break circulation, stack out and drop through at 4245'. RIH to TD. Circulate 2 bottoms up 800 gpm, 2300 psi. Condition mud per MI representative. POH. 20K overpull at 2960',2838', AND 2618'. 20K overpull and pump through tight hole at 2300', 2266', and 2250'- 2210'. W ipe f/ 2290' TO 2210'. RIH F/ 2210' TO 2316 ; CBU f/ 2316' TO 2210 ; 776 gpm, 1752 psi, 90K PU wt. 90K. SO 60K, 0 rpm. Pump out f/2222' TO 1747'; 328 gpm, 470 psi. POH f/1747' to 1369'. Monitor well, PJSM, RIH f/ 1369' U1942'. 25K drag, wash f/ 1942' to 2411', 239 gpm, 351 psi. POH backreaming f/ 2411' to 1464', 800 gpm, 1897 psi, 100 rpm, 5K tq, PU wt 75K. POH f/1464' TO 707' Monitor well, PJSM, RIH F/ 707' TO 1860'. RIH w/30K drag at 1860, wash without rotating f/1860' to 2076', 688 gpm, 195 spm, 1487 psi, PU wt. 90K, SO wt. 30K. Unable to get bit past 2076'. POH. Back ream f/2076' TO 1930' 688 gpm, 1487 psi, 36 rpm, 6K tq. Large quantities of 12/20 sized material unload across shakers. Per geo 80% chert, 20% quartz sand substrate f/conglomerate zone at 1740' MD/1565' TVDSS +-. Wash down w/out rotating f/1930' to 2076', roll off ledge at 2076', continue wash in hole to 2209' with tight hole. 123 gpm, 198 psi, PU wt. 60K SO wt. 30K. Back ream f/2209' to 2122, 774 gpm, 1794 psi, PU wt. 90K, SO wt. 60K, 80 rpm, 6K tq., continue to wash in hole to 2411' w/123 gpm, 198 psi. PU wt. 90K, SO wt. 60K. Continue to wash in hole to 4303', taking weight at 2580' 2850' and 2900'. Circulate 125 gpm, 200 psi. PU wt. 90K, SO wt. 15:30 - 16:30 16:30 - 00:00 9/30/2006 00:00 - 02:00 1.00 CASE N 7.50 CASE N 2.00 CASE N 02:00 - 03:00 1.00 CASE N 03:00 - 05:00 2.00 CASE N 05:00 - 09:30 09:30 - 12:00 12:00 - 12:30 12:30 - 14:30 14:30 - 15:00 15:00 - 17:00 17:00 - 19:00 19:00 - 19:30 19:30 - 20:00 20:00 - 21:30 4.50 CASE N 2.50 CASE N 0.501 CASE I N 2.00 CASE N 0.50 CASE N 2.00 CASE N 2.00 CASE N 0.50 CASE N 0.50 CASE N 1.50 CASE N STUC SURF STUC SURF STUC SURF STUC SURF STUC SURF STUC SURF STUC SURF STUC ISURF STUC SURF STUC SURF STUC SURF STUC SURF STUC SURF STUC SURF STUC SURF 21:30 - 22:30 1.00 CASE N STUC SURF 22:30 - 23:30 1.00 CASE N STUC SURF 23:30 - 00:00 0.50 CASE N STUC SURF 10/1/2006 I 00:00 - 01:00 I 1.00 I CASE I N I STUC I SURF Printed: 70/25/2006 10:02:55 AM ~ . Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 10/1/2006 00:00 - 01:00 1.00 CASE N STUC SURF 01:00 - 03:00 2.00 CASE N STUC SURF 03:00 - 05:00 2.00 CASE N STUC SURF 05:00 - 08:00 3.00 CASE N STUC SURF 08:00 - 10:00 2.00 CASE N STUC SURF 10:00 - 11:30 1.50 CASE N STUC SURF 11:30 - 12:00 0.50 CASE N STUC SURF 12:00 - 12:30 0.50 CASE N STUC SURF 12:30 - 14:00 1.50 CASE N STUC SURF 14:00 - 18:00 4.00 CASE N STUC SURF 18:00 - 22:00 4.00 CASE N STUC SURF 22:00 - 00:00 I 2.00 ~ CASE I N ~ STUC I SURF 10/2/2006 I 00:00 - 01:00 I 1.00 I CASE I N I STUC I SURF 01:00 - 02:00 I 1.001 CASE I N I STUC I SURF 02:00 - 09:30 I 7.501 CASE I N I STUC I SURF 09:30 - 10:00 0.50 CASE N STUC SURF 10:00 - 11:00 1.00 CASE N STUC SURF 11:00 - 11:30 0.50 CASE N STUC SURF 11:30 - 12:00 0.50 CASE N STUC SURF 12:00 - 14:30 2.50 CASE N STUC SURF 14:30 - 15:30 1.00 CASE P SURF 15:30 - 16:30 1.00 CASE P SURF 16:30 - 18:30 2.00 CASE N STUC SURF 18:30 - 20:00 1.50 CASE N STUC SURF 20:00 - 22:00 2.00 CASE N STUC SURF 22:00 - 22:30 0.50 CASE N STUC SURF 22:30 - 23:30 1.00 CASE N STUC SURF 60K. Circulate two hole volumes. Large quantity of chert/sand material across shakers gradually tapering to minor amounts. POH w/out pumps or rotation to 2450'. Tight spot. Backream through tight hole at 2454', 2438', 2410', and 2340'. 625 gpm, 1294 psi. 80 rpm, 7K-8K tq. Hole problems encountered similar to past wiper trips. Rack back HWDP and 8" collars. RU to run casing. PU shoe track, and check floats. OK. RIH w/9-5/8" 47# BTC-M L-80 casing to 372'. RD 9-5/8" casing equipment and RU 13-3/8" casing running equipment. RIH w/13-3/8" 68.5# BTC-M L-80 casing f/372' to 2438'. Check and plot running parameters w/town team while RIH. OK. Circulate in hole and work casing down f/2438' to 2667'. Casing free w/225K Up. 450 gpm, 725 psi. Small amounts of chert and sand across shakers. Attempt to work casing below 2667' seeing 190K to 225K up wt. 95K SO wt. on free stroke and stacking out to drive casing. 476 gpm, 722 psi. Consult w/town team and decision made to continue attempt to RIH as long as casing not sticking when coming up hole. Work mixed 9-5/8"/13-3/8" casing between 2667' and 2657'. No movement possible above 2657' or below 2667'. PU wt. 350K, SO wt 0, 400 gpm, 550 psi. Consult w/town team and decision made to attempt to free pipe and POH. Work 10' free stroke PU wt. 350K, SO wt. 0. Free casing and pull to 2626' and circulate while rigging up to POH w/surface casing. PJSM w/crew, service hands, and WSL on casing pulling practices. POH and LD 56 jts. 13-3/8" 68# BTC-M casing. 13-3/8" Jt. # 10 had 4" wide x 1/2" deep indentations in jt. at midjoint when pulled from well. RU to pull 9-5/8" 47# BTC-M casing. LD 9 jts. 9-5/8" casing Break out and LD float equipment f/shoe track. Clear rig floor. PJSM w/all hands. RD casing running equipment and clean rig floor. Service top drive, lubricate rig. Slip and cut 88' of drilling line. MU cleanout BHA #20 w/12-1/4" Hughes MX-C1 re-run bit Qetted 3 x 18 & 1 x 12), 16" OD near bit stabilizer, 2 Schlumberger 30' x 8" NM drill collars, 16" NM stabilizer, NM Xover, three 6-9/16" OD NM spiral drill collars, floaUsaver sub, hyd. jars, 17 jts. 5" HWDP. RIH f/ 707' to 2125', 25K drag at 2125'. Wash down & backream f/ 2026' TO 2222', 90KPU wt., 60K SO wt., 723gpm, 1627 psi 80 rpm, 5K TQ, 75K rot. wt. RIH f/2222' to 2697'. Wash down f/2697' TO 2792' rotate and wash only when Printed: 10/25/2006 10:02:SS AM • ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 10/2/2006 22:30 - 23:30 1.00 CASE N STUC SURF 23:30 - 00:00 0.50 CASE N STUC SURF 10/3/2006 00:00 - 02:00 2.00 CASE N STUC SURF 02:00 - 04:30 ~ 2.50I CASE ~ N I STUC I SURF 04:30 - 05:30 1.00 CASE N STUC SURF 05:30 - 06:00 0.50 CASE N STUC SURF 06:00 - 07:30 1.50 CASE N STUC SURF 07:30 - 09:00 1.50 CASE N STUC SURF 09:00 - 12:00 3.00 CASE N STUC SURF 12:00 - 12:30 0.50 CASE N STUC SURF 12:30 - 15:30 3.00 CASE N STUC SURF 15:30 - 22:30 7.00 CASE N STUC SURF 22:30 - 00:00 ~ 1.50 ~ CASE ~ N ~ STUC ~ SURF 10/4/2006 100:00 - 00:30 I 0.501 CASE I N I STUC I SURF 00:30 - 04:00 3.50 CASE N STUC SURF 04:00 - 07:00 3.00 CASE N STUC SURF 07:00 - 10:00 3.00 CASE N STUC SURF 10:00 - 11:30 1.50 CASE N STUC SURF 11:30 - 13:30 2.00 CASE N STUC SURF 13:30 - 16:00 2.50 CASE N STUC SURF 16:00 - 17:30 1.50 CASE N STUC SURF 17:30 - 20:30 3.00 CASE N STUC SURF 20:30 - 22:00 1.50 CASE N STUC SURF 22:00 - 00:00 I 2.001 CASE I N I SFAL I SURF 10/5/2006 00:00 - 01:00 1.00 CASE N SFAL SURF 01:00 - 05:00 4.00 CASE P SURF 05:00 - 06:00 1.00 CASE P SURF 06:00 - 07:30 1.50 CASE P SURF 07:30 - 10:00 2.50 CASE N SFAL SURF necessary. 95K PU wt.; 55K SO wt., 768 gpm, 2007 psi, 753 bbls. pumped, 80 rpm., 6K tq., 75K rot. wt. POH f/2792' to 2597', 95K PU wt., 55K SO wt. POH f/2592' to 1939' washing and backreaming only when necessary. Record parameters for trip comparisons per instruction f/town team. Ream down f/2031' to 2602'. 400 GPM- 630 PSI. 40 RPM- 6K TQ Record weight parameters on drillers trend sheet and forvvard to town team. CBU after reaming hole. 800 gpm, 2050 psi, 80 rpm, 8K tq. POH w/out pumps and rotation if possible to compare parameters with last trip out f/2792' to 1939' after reaming in hole through same section. Record up/down weight data on drillers trend sheet and forward to town team. RIH w/cleanout BHA # 20 f/1940' to 4304'. Hole in good condition. CBU 800 gpm, 2520 psi, 50 rpm, 8K tq. Reciprocate 80'. POH to 1274'. 115K PU wt., 60K SO wt., pumps off, no rotation. Pull 35K over at 4135', 3965', 2916', 2602', 2415'. Pump through tight hole at 2585', 2550', 2525', and 2490'. POH f/1274' to 707'. RIH f/707' to surface section TD at 4303' MD/2576' TVD. Circ f/4303' to 3642' setting back one stand every hour. 620 gpm, 1577 psi. 105K PU wt., 50K SO wt. w/pumps off. Reduce rate to 409 gpm, 767 psi at BU. Monitor well. Mobilize components for new surface casing configuration. MW 9.3 ppg. Consult w/town team. PJSM and POH f/3624' to 2602'. POH to 2031'. Mobilize components f/new surface casing configuration. Load pipe shed, drift, strap pipe. Ream f/2031' to TD at 4303'. 415 gpm, 800 psi, 40 rpm. CBU. 600 gpm, 1530 psi. POH to BHA. 35K overpull at 2877', 2828', 2810', 2467'. Stand back HWDP and drill collars. LD BHA. Clean rig floor. PJSM on running casing. RU to run 9-5/8" casing. PJSM w/all hands, casing hand, WSL, toolpusher on casing running procedures. RIH to 615' w/9-5/8" casing. Shut down. PJSM. Clear ice build up f/derrick. RIH w/9-5/8" casing f/615' to 1989'. PJSM. Change over to 13-3/8" casing running equipment. RU 13-3/8" Franks TooL Unable to pump through Franks tool. Steam tool top to bottom. No help. Mobilize and change out new valve section for Franks tooL Continue repair of Franks fillup tool. RIH w/13-3/8" 68# BTC casing to 3218'. No hole problems to this point. Install centralizers on TAM port collar jt. and RIH w/TAM port collar. Run 13-3/8" 68 #/9-5/8" 47/40# mixed string surface casing. 13-3/8" to 2323' and x-over to 9-5/8" to 4295'. MU landing jt w/hanger. MU hanger to top jt. of 13-3/8" casing. Attempt to PU string wt. to RIH and land hanger on ring Printed: 10/25/2006 10:02:55 AM • • Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 10/5/2006 07:30 - 10:00 2.50 CASE N SFAL SURF below. Hanger separated f/landing jt. as it was lifted from contact w/slips. Pipe wt. dropped back into slips. LD landing jt., back out hanger and inspect. Hanger should have split ring which allows weight transfer between string and hanger. Split ring was missing f/installation. Per service hand it was not installed at assembly point of equipment. Circ. and reciprocate 13-3/8" casing and wait on new hanger. 303 gpm, 351 psi. PU wt. 130K, SO wt. 100K. 10:00 - 13:00 3.00 CASE P SURF Circulate and condition mud prior to cement job. Lower Vis and YP. 13:00 - 14:00 1.00 CASE P SURF Land casing hanger w/9-5/8" shoe at 4295'. Circ. 303 gpm 350 psi. Note a 15K increase in weight parameters to PU wt. 145K, SO wt 115K. 14:00 - 15:00 1.00 CEMT P SURF PJSM, RD Franks fill up tool, RU 13-3/8" dual plug dropping head. Loading of plugs witnessed by BP WSL Blow down cementing lines. 15:00 - 20:30 5.50 CEMT P SURF PJSM, Set valves on cement head to bottom valve and pump 5 bbls. H20 w/Schlumberger to charge lines to rig floor. Test lines to 4500 psi. Pump 100 bbls. Mudpush, 275 gpm, 280 psi. Drop bottom plug, see plug indicator trip. Start lead mix at 15:23 and pump 839 bbls. 10.75 ppg Arctic Set Lite cement, 176 gpm, 205 psi. Partial losses when Mudpush came around shoe. Partial losses when lead came around shoe. Pressure dropped f/850 psi to 160 psi. Returns dropped from 36% to 17%. Slowed pump rate to 4 bbls./min. Returns increase slowly to 20%. Start tail mix at 18:07 and pump 227 bbis. premium "G" cement w/additives and CemNET at 2#/bbl., 231 gpm, 340 psi. Drop top plug. See indicator trip. Pump 10 bbls of H20 displacemnt w/Schlumberger to clear lines of cement. Pump remaining 478 bbls of 9.3 ppg drilling mud displacement w/rig pumps. Stage up displacement rate to 294 gpm and see return flow decreasing. Back off displacement rate to 252 gpm--return flow stabilized. Good returns throughout displacement. See improvement in returns after tail w/CemNET rounded shoe. Plug bump early at 5710 strokes w/FCP at 805 psi. CIP at 20:28. Noted 108 bbl cement returns. Increase pressure to 1400 psi and hold for 5 minutes on chart and see flat line. Bleed off pressure at surface and check floats. Ok. 20:30 - 22:30 2.00 CEMT P SURF BD lines, flush riser and annular preventer. RD cementing head, casing elevators, diverter line. 22:30 - 23:00 0.50 BOPSU P PROD1 Inspect derrick and chip ice. 23:00 - 00:00 1.00 BOPSU P PROD1 RU casing tongs, back out and LD 13-3/8" landing jt. RD casing tongs. 10/6/2006 00:00 - 01:30 1.50 BOPSU P PROD1 ND diverter and stand back. 01:30 - 03:00 1.50 BOPSU P PROD1 Install FMC 13-5/8" 5K psi Big Bore Casing Head. Test casing head metal to metal seal f/30 mins. to 1000 psi. OK. 03:00 - 06:00 3.00 BOPSU P PROD1 NU BOP stack and RU for BOP test. Chuck Scheve, AOGCC waived AOGCC attendance at BOP test. 06:00 - 09:30 3.50 BOPSU P PROD1 Test BOP. 250 psi low, 3500 psi high. Test witnessed by Duncan Ferguson BP WSL and Chris Weaver Nabors Tool Pusher. 09:30 - 10:30 1.00 BOPSU P PROD1 RD test equipment and clear rig floor. Printed: 10/25/2006 10:02:55 AM • ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 10/6/2006 10:30 - 12:00 12:00 - 14:30 14:30 - 17:00 17:00 - 21:30 21:30 - 23:30 23:30 - 00:00 10/7/2006 00:00 - 01:30 01:30 - 02:30 02:30 - 04:30 04:30 - 05:00 03:30 - 06:00 06:00 - 10:00 10:00 - 15:30 15:30 - 16:30 16:30 - 18:00 18:00 - 19:30 19:30 - 20:00 20:00 - 00:00 1.50 DRILL P 2.50 DRILL P 2.50 DRILL P 4.50 DRILL P 2.00 DRILL P 0.501 DRILL I P 1.50 DRILL P 1.00 DRILL P 2.00 DRILL P 0.50 DRILL P 2.50 DRILL P 4.00 DRILL P 5.50 DRILL N 1.00 DRILL N 1.50 DRILL N 1.50 DRILL N PROD1 Remove ice buildup f/derrick. PROD1 Install oil cooling unit on topdrive. PROD1 PJSM on nuke safery w/all hands, BP WSL, toolpusher. PU 8.5" RSS BHA # 21w/RS161 H6SW bit, bias unif, extension sub, control collar/ported float, rec sub, flex collar, ARC, MWD, ADN, 2 NM Spiral DC, NM Stab, NM Spiral DC, FIoaUSaver sub, Hyd. Jars, 17 jts. HWDP, 5" drill pipe as required. Shallow test RSS to 330 gpm. Load nuke source. Shallow test MWD. 467 gpm 1270 psi. PROD1 PU 63 jts. 5" drill pipe. TIH. Wash down w/last stand. Tag up on cement stringers at 4157'. PROD1 RU and test 13-3/8" x 9-5/8" surface casing to 3500 psi. and record on chart for 30 mins. Tail slurry at 500 psi compressive strength at 11 hrs or 06:00 10-7-06 per Schlumberger lab data. PROD1 Drill/wash cement to 4209'. Drill out float collar and cement to 4215'. 400 gpm, 1150 psi, 50 rpm, tq. 8.5K. PROD1 Drill out plugs, float collar and shoe track to 4287'. PROD1 Circulate new 8.9 ppg Flo-Pro NT mud to well 430 gpm, 1017 psi. PRODi Drill out shoe + 20' to 4323' and pull bit back into 9-5/8" casing. PROD1 CBU 450 gpm, 1140 psi. PRODi Perform LOT, 11.59 ppg EMW. 2575' ND. MW = 8.9. 360 psi. PROD1 Drill 8.5" hole w/RSS. Drill f/4327' to 4802'. DFAL PROD1 MWD tool problems. MW = 8.9 ppg. POH. Pump out of hole inside 9-5/8" casing f/4232' to 4030' due to well swabbing. Pump dry job. POH to BHA. PJSM on nukes. LD BHA. DFAL PROD1 Service rig and topdrive while downloading MWD data. Hook up blower hose. DFAL PROD1 PJSM on nuke safety, BP WSL, all hands, toolpusher, MWD hands. PU BHA, RIH, load nukes. DFAL PROD1 RIH and shallow test MWD at 833', 415 gpm, 1058 psi. Establish baseline ECDs above shoe at 4235'. 460 gpm, 1560 psi. DFAL PROD1 RIH f/4235' to 4802'. PROD1 Drill w/RSS f/4802' to 5105`. 466 gpm, psi on 1520, psi off 1475, tq. on 10K, tq. off 9K, Up wt. 140K, SO wt. 70K, Rot. wt. 90K, rpm 130. Calculated ECD = 10.36 ppg. Actual ECD = 10.40 ppg at 23:59/5105'. RSS ADT for 24 hrs. = 4.85 hrs. New hole footage 24 hrs. _ 810'. PROD1 Drill w/RSS f/5105' to6412'. 480 gpm, psi on 1600, psi off 1590, tq. on 14K, tq. off 13K, Up wt. 1953K, SO wt. 90K, Rot. wt. 110K, rpm 130. Calculated ECD = 10.39 ppg. Actual ECD = 10.48 ppg. PROD1 Drill w/RSS f/6412' to6490'. 462 gpm, psi on 1920, psi off 1790, tq. on 16K, tq. off 15K, Up wt210K, SO wt. 85K, Rot. wt. 115K, rpm 130. PRODi Circulate 2 bottoms up, 966 bbls, 460 gpm, 1790 psi. 0.50 DRILL N 4.00 DRILL P 10/8/2006 100:00 - 12:00 I 12.001 DRILL I P 12:00 - 13:00 ~ 1.00 I DRILL ~ P 13:00 - 15:30 I 2.501 DRILL I P Printed: 10/25/2006 10:02:55 AM • ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: i0/20/2006 IContractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 '~ Rig Name: NABORS 7ES Rig Number: 10/8/2006 15:30 - 19:30 4.00 DRILL P PROD1 19:30 - 20:30 1.00 DRILL P PROD1 20:30 - 21:00 0.50 DRILL P PROD1 21:00 - 00:00 3.00 DRILL N WAIT PROD1 10/9/2006 00:00 - 15:00 15.00 DRILL N WAIT PROD1 15:00 - 15:30 0.50 DRILL P PROD1 15:30 - 00:00 8.50 DRILL P PROD1 10/10/2006 00:00 - 02:30 2.50 DRILL P PROD1 02:30 - 03:30 1.00 DRILL P PROD1 03:30 - 05:30 2.00 DRILL P PROD1 05:30 - 06:30 1.00 DRILL P PROD1 06:30 - 08:30 2.00 DRILL P PROD1 08:30 - 09:00 0.50 DRILL P PRODi 09:00 - 10:30 1.50 EVAL P OTHCMP 10:30 - 11:00 0.50 EVAL P OTHCMP 11:00 - 12:00 1.00 EVAL P OTHCMP 12:00 - 13:30 1.50 EVAL P OTHCMP 13:30 - 15:30 2.00 EVAL P OTHCMP 15:30 - 18:30 3.00 EVAL P OTHCMP MADPass f/6490' to 5936'. 159 gpm, 60 rpm, 14K tq. W inds beginning to cause problems w/kelly hose and service loop in derrick. Lost returns at 5936'. Shut down pumps and monitor well. Pull over to 225K. No movement up. Pick up single and work pipe down hole w/rotation. Regain circulation. 160 gpm, 345 psi. PU wt. 175K, SO wt. 80K. RIH f/5936' UTD at 6490'. CBU 488 bbls, 422 gpm, 1300 psi. Rig having problems keeping service loops and kelly hose from exiting windwalls or hanging up behind drill pipe in derrick in high winds. Per pad operator wind on pad 57 mph steady and 65 mph gusts. Rig team made decision to stay on bottom and circulate w/reciprocation and rotation. Pulled over 25K at 6477'. Begin rotation 27 rpm, 60 gpm, 170 psi, 15K tq. Rot wt. 115K, PU wt. 210K, SO wt. 85K. 60. Reciprocate 30' f/6490' to 6460'. Shut down operations. W ind 57 mph w/gusts to 67 mph. Circulate and reciprocate f/6490' to 6460'. 60 gpm, 180 psi. 25 rpm, 17K tq. Service loop and kelly hose blowing outside windwalls or hanging up behind drill pipe. Perform rig maintenance. Service topdrive and rig. Clean, paint BOP stack. Wind abating. Resume operations. POH f/6490' to 6022'. MADPass f/6033' to 6022'. 159 gpm, 365 psi, tq. 14K. 60 rpm. Lost partial returns. Pull 25K over string wt. work free w/rotation down and regain circulation. Continue w/MADPass f/6022' U4709'. 159 gpm 285 psi, tq. 10K, Up wt. 170K, SO wt. 65K. MADPass f/6022' to RA tag in 9-5/8" casing at 4047'. 166 gpm,263 psi, tq. 8K. 60 rpm POH to 2573'. MW = 9.1 ppg. Wash through 13-3/8" x 9-5/8" X-over several times at 500 gpm. RIH one stand to position and keep bit and MWD below X-over during circulation. Circulate 500 gpm, rotate 120 rpm until tluid clean over shakers. Monitor well bore. Pump dry job. Drop 2 1/4" rabbit. POH to BHA. Mud wt In 9.1 ppg. Out 9.1 ppg. Rack back HWDP and 6 3/4" drill collars. PJSM. Remove source. Lay down ADN, MW D, CDR, NM flex dc, Rec sub, float sub, Extension sun, Bias unit. Bit. Down load MWD in pipe shed. Load pipe shed with Schlumberger logging tools. PJSM. Pick up and make up Schlumberger sidewall core gun carrier Run in the hole with logging Schiumberger sidewall core gun carrier on 5" dp to 1989'. Circulate 15 min. at 6 bbl / min 120 psi. Continue to run in the hole from 1989' to RA marker at 4047'. PJSM with Schlumberger. Hang E-line sheave in derrick. Make up side door entry sub and E-line. Pump E-line down to wet connect at 318 gpm 290 psi. Confrim latch up by psi increase to 321 psi. Verify tools operating. Run in the hole from 4047' to 6410' Printed: 10/25/2006 10:02:55 AM • ~ Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: S-401 S-401 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 7ES Spud Date: 9/16/2006 Start: 9/15/2006 End: 10/20/2006 Rig Release: 10/25/2006 Rig Number: 10/10/2006 I 18:30 - 21:30 21:30 - 22:30 22:30 - 23:30 23:30 - 00:00 0.50 EVAL P 10/11/2006 00:00 - 01:30 1.50 EVAL P 01:30 - 02:30 1.00 EVAL N 02:30 - 03:00 I 0.501 EVAL I P 03:00 - 06:00 I 3.00 I CLEAN I P 06:00 - 08:00 2.00 CLEAN P 08:00 - 10:00 2.00 CLEAN P 10:00 - 13:00 I 3.001 CLEAN I P 13:00 - 14:00 1 1.001 CLEAN 1 P 14:00 - 14:30 0.50 CLEAN P 14:30 - 16:30 2.00 CLEAN P 16:30 - 00:00 ~ 7.50 ~ CLEAN ~ P 10/12/2006 ~ 00:00 - 11:30 ~ 11.50 ~ CLEAN ~ P OTHCMP Pull out of the the from 6410'. 45 Sidewall core samples taken at 6391.6', 6390.8', 6390', 6332.3', 6331.5', 6330.7', 6274.9', 6274.1', 6273.3', 6227.5', 6226.7', 6203.9', 6203.1', 6178.3', 6177.5', 6176.8', 5970', 5962.2', 5968.4', 5449.6', 5948.8', 5900', 58992', 5801.3', 5799.5', 5798.7', 5778.9', 5729.1', 5728.3', 5701.5', 5594.7', 5593.9', 5500.1', 5499.3', 54~8.5', 5394.8', 5312', 5311.2', 5251.4', 5076.6', 5075.8',5037', 5013.2', 5012.4'. OTHCMP Pull out of the hole from 5012' to 4047'. OTHCMP PJSM with Schlumberger. Rig down E-line connector. Pull out of 5" dp with E-line. Rig down E-line sheaves from derrick. Remove side door entry sub. OTHCMP Pull out of the hole from 4047' to 3311'. OTHCMP Pull out of the hole from 3311' to 850'. Mud wt. 9.1 ppg. WAIT OTHCMP Suspend operations due to power outage thru out WOA. All communications lost. OTHCMP Pull out of the hole from 850' to Schlumberger logging tools. Lay down sidewall cores. Recovering 42 of 45 cores with samples. All shots recovered. CLEAN Pick up clean out BHA #23 consiting of MX-C1 8 1/2" bit, Near bit stab, 2 NM spiral dc, NM stab, NM spiral dc, float sub, Jars, 17 5" HWDP, 49 jts 5" dp, 8 1/2" string mill, 2 jts 5" dp, X-O, 9 5/8" casing scraper, 2 5 1/2" boot baskets, Bit sub = 2274' CLEAN Run in the hole from 2274' to 6490' at 60' per min. Wipe tight hole from 4710' to 4790' CLEAN Work string mill through shoe track and 9 5/8" scraper through 7" liner setting area at 80 rpm with 16k rotary tq. 405 gpm 780 psi. Monitor wellbore. Mud wt. In 9.1 ppg. 0ut 9.1 ppg. CLEAN Pull out of the hole from 6490' to 2369'. Back reaming tight areas from 4810' to 4750' and from 4986' to 4900'. CLEAN Rotate and reciprocate pipe from 2369' to 2332'. (9 5/8" X 13 3/8" X-O) 600 gpm 965 psi. CLEAN Clean ice from derrick. CLEAN Run in the hole from 2369' to 6490'. No problems. Recording up and down wts. every 200' ran. 4260' Up wt. 115k S/O wt. 60k. 4450' Up wt.117k. S/O wt. 65k. 4640' Up wt. 117k. S/O wt. 65k. 4829' Up wt. 117k. S/O wt. 65k. 5019' Up wt. 125k. S/O wt. 65k. 5208' Up wt. 130k. S/O wt. 65k. 5398' Up wt. 130k. S/O wt. 65k. 5398 Up wt. 130k. S/O wt. 65k. 5585' Up wt, 140k. S/O wt. 70k. 5773' Up wt. 150k. S/O wt. 70k. 5963' Up wt. 160k. S/O wt. 70k. 6153' Up wt. 170k. S/O wt. 70k. 6341' Up wt. 170k. S/O wt. 72k. 6490' Up wt. 190k. S/O wt. 90k. CLEAN Displace wellbore to 8.9 ppg SF Flo-Pro mud with 2% screen clean. Rig up Hot Oil, heating Pro-Flo 8.9 ppg SF mud to 100 degrees. Continue to circulate to meet Weatherfords flow thru 150 micron screen test. Up wt. 190k. S/O wt. 90k. 103 gpm 174 psi. Mud wt. In 8.9 ppg. Out 8.9 ppg. Mud temp. in 100 degrees. Out 68 degrees. CLEAN Continue to circulate and condition mud to meet Weatherfords flow thru 150 micron screen test. Up wt. 190k. S/O wt. 90k. 103 gpm 174 psi. Mud wt. In 8.9 ppg. Out 8.9 ppg. Utiliz Hot Oil to heat 8.9 ppg SF Flo-Pro mud. Temp In 100 degrees. Out 90 3.001 EVAL I P 1.00 EVAL P 1.00 EVAL P Printed: 10/25/2006 10:02:55 AM ~ • Legal Well Name: Common Well Name: Event Name: Contractor Name: Rig Name: S-401 S-401 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 7ES Spud Date: 9/16/2006 Start: 9/15/2006 End: 10/20/2006 Rig Release: 10/25/2006 Rig Number: 10/12/2006 00:00 - 11:30 11.50 CLEAN P CLEAN 11:30 - 12:00 0.50 CLEAN P CLEAN 12:00 - 19:30 I 7.50I CLEAN I P I I CLEAN 19:30 - 00:00 I 4.50 I CLEAN I P I I CLEAN 10/13/2006 I 00:00 - 02:00 I 2.00 I CLEAN I P I I CLEAN 02:00 - 09:30 I 7.501 CLEAN I P I I CLEAN 09:30 - 10:00 0.50 CLEAN P CLEAN 10:00 - 12:30 2.50 CLEAN P CLEAN 12:30 - 14:00 I 1.501 CLEAN I P I I CLEAN 14:00 - 16:30 I 2.501 CLEAN I P I I CLEAN 16:30 - 18:00 1.50 CLEAN P CLEAN 18:00 - 19:00 1.00 CLEAN P CLEAN 19:00 - 19:30 I 0.50 I CLEAN I P I I CIEAN degrees. Change shaker screens to 230 from 325 on two of the four shale shakers for increased flow rate. Circulate and condition mud to meet Weatherfords flow thru 150 micron screen test. Up wt. 190k. S/O wt. 90k. 253 gpm 290 psi. Mud wt. In 8.9 ppg. Out 8.9 ppg. Utilize Hot Oil to heat 8.9 ppg SF Flo-Pro mud. Temp In 100 degrees. Out 90 degrees. Note: Saw an immediate increase of sand and fine slit on shale shakers. Circulate and condition mud to meet Weatherfords flow thru 150 micron screen test. Pumping a 30 bbl Hi-Vis weighted sweep 1 ppg over. Up wt. 190k. S/O wt. 90k. 253 gpm 290 psi. Mud wt. In 8.9 ppg. Out 8.9 ppg. Utiliz Hot Oil to heat 8.9 ppg SF FlaPro mud. Temp !n 100 degrees. Out 90 degrees. Changing shaker screens back to 325. Note: Hi-Vis weighted sweep brought back 2x the cuttings. Fine silt. Screened back down to 230 on two shale shakers. Circulate and condition mud to meet Weatherfords flow thru 150 micron screen test. Up wt. 190k. S/O wt. 90k. 225 gpm 290 psi. Mud wt. In 8.9 ppg. Out 8.9 ppg. Utiliz Hot Oil to heat 8.9 ppg SF Flo-Pro mud. Temp In 100 degrees. Out 90 degrees. Circulate and condition mud to meet Weatherfords flow thru 150 micron screen test. Up wt. 190k. S/O wt. 90k. Reducing flow rate to 150 gpm 160 psi. Mud wt. In 8.9 ppg. Out 8.9 ppg. Utiliz Hot Oil to heat 8.9 ppg SF Flo-Pro mud. 7emp In 100 degrees. Out 90 degrees. Switch from rig power to shore power. Monitor wellbore. Pull out of the hole from 6490' to 4260'. Work thru tight areas at 30 to 25k over pull with no rotation or pump at 6204', 6160', 6068', 6023', 5936' S909', 5874' 5872', 5232', 5014', 5009'. Change all four shakers back to 325 mesh shaker screens from 230 mesh. 9 5/8 casing shoe at 4294' Circulate and condition mud staging pumps from 300 gpm 290 psi to 677 gpm 1080 psi. 80 rpm 7.5 tq. Mud wt. in 8.9 ppg. Out 8.9 ppg. Utiiize Hot Oil to heat 8.9 ppg SF Flo-Pro mud. Temp In 100 degrees. Out 90 degrees. Circulate 3 BU. Solids still to great to perfrom a screen test. Rack back 1 stand and continue to rotate and reciprocating drill string from 4165' to 4255' at 677 gpm 1070 psi, 80 rpm, 7k tq. Circulated 6 bottoms up before mud would pass Weatherfords 150 micron production screen test. Monitor wellbore. Pull out of the hole from 4165' to 2327'. Circulate while rotating and reciprocating dri(I string across 9 5/8 x 13 3/8 X-O at 650 gpm, 860 psi, 60 rpm, 3k tq. Mud passed Weatherfords 150 micron production screen test. Mud wt. In 8.9 pPg. Out 8.9 PP9• Monitor wellbore. Pull out of the hole from 2327' to 2192'. Lay down lay Bit sub, 2 boot baskets, 9 5/8" casing scraper, X-O and 8 1/2" string mill. String mill full gauge. Both boot baskets Printed: 10/25/2006 10:02:55 AM • ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING i Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 10/13/2006 19:00 - 19:30 0.50 CLEAN P 19:30 - 21:00 1.50 CLEAN P 21:00 - 00:00 I 3.001 CLEAN I P 10/14/2006 I 00:00 - 02:00 I 2.00 I CLEAN I P 02:00 - 03:30 1.50 CLEAN P 03:30 - 07:30 4.00 CLEAN P 07:30 - 09:00 I 1.50I CLEAN I P 09:00 - 13:30 1 4.501 CLEAN I P 13:30 - 15:00 1.50 CLEAN P 15:00 - 15:30 0.50 CLEAN P 15:30 - 16:00 0.50 CLEAN P 16:00 - 19:00 3.00 CLEAN P 19:00 - 22:00 3.00 CLEAN P 22:00 - 23:30 I 1.50 I CLEAN I P 23:30 - 00:00 I 0.50 I CLEAN I P 10/15/2006 I00:00 - 01:00 ( 1.00 I CLEAN I P 01:00 - 04:00 I 3.001 CLEAN I P 04:00 - 05:30 I 1.501 CLEAN I P CLEAN empry. CLEAN Run in the hole from 2192' to 9 5/8" casing shoe at 4294'. Filling drill pipe. Up wt. 105k. S/O wt. 63k. CLEAN Run in the hole from 4294' to 6490' at 60 fVmin.Taking 30k down wt. at 4715', 4901', and 5290'. Wash and ream from 4715' to 4804', 4901' to 4993', 5290' to 5365' at 200 gpm 220 psi. 50 rpm. After washing and reaming each interval drill string passed thru each interval with out any problems. Circulate for 10 min. 100 gpm 237 psi. CLEAN Monitor wellbore for 10 min. Puli out of the hole from 6490' to 9 5/8" casing shoe at 4294'. No problems. Monitor wellbore for 10 min. CLEAN Run in the hole from 4294' to 6490' at 60 ft/min. No problems. CLEAN Circulate 2 1/2 open hole volumes at 2 bbi/min 85 gpm 162 psi. Up wt. 180k. S/O 85k. Mud wt. In 8.9 ppg. Out 8.9 ppg. Utilize Hot Oil to heat 8.9 ppg SF Flo-Pro mud. Temp In 100 degrees. Out 90 degrees. CLEAN Monitor wellbore for 10 min. Pull out of the hole from 6490' to 4235'. Encountered no tight hole. 9 5/8" casing shoe at 4294'. CLEAN Circulate and condition mud. Rotate reciprocating drill string at 90 rpm, 7.5k tq. Up wt. 175k. S/O wt 80k Rot wt. 80k. Staging pumps from 378 gpm 393 psi to 599 gpm 860 psi. 80 rpm 7.5 tq. Mud wt. In 8.9 ppg. Out 8.9 ppg. Utilize Hot Oii to heat 8.9 ppg SF Flo-Pro mud. Temp In 100 degrees. Out 90 degrees. Circulate 6 BU before mud would pass Weatherfords 150 micron production screen test. CLEAN Run in the from 4235' to 6490' at 60' feet per/min. Hole in good shape. CLEAN Fill pipe and circulate 43 bbls of clean mud at 85 gpm 2 bbl/min 140 psi. CLEAN Monitor well bore for 10 min. Pull out of the slowly from 6490' to 6000'. Up wt. 185k S/O wt. 90k. CLEAN Back ream from 6000' to 4295' at 24' feet per/min. 300 pgm, 380 psi, 65 rpm 12k tg. No probiems. CLEAN Circulate and condition mud. Rotate reciprocating drill string at 90 rpm, 7.5k tq. Up wt. 175k. S/O wt 80k Rot wt. 80k. Staging pumps from 378 gpm 393 psi to 599 gpm 860 psi. 80 rpm 7.5 tq. Mud wt. In 8.9 ppg. Out 8.9 ppg. Utilize Hot Oil to heat 8.9 ppg SF Flo-Pro mud. Temp In 105 degrees. Out 97 degrees. Circulate 6 BU before mud would pass Weatherfords 150 micron production screen test. CLEAN Monitor wellbore for 10 min. Run in the from 4235' to 6490' at 60 fUmin. Hole in good shape. CLEAN Fill pipe and circulate 43 bbis of clean mud at 85 gpm 2 bbl/min 140 psi. Up wt. 180k. S/O wt.85k. CLEAN Monitor wellbore for 10 min. Pull out of the hole from 6440' to 6033' slowly at 20 ft/min. No hole problems. CLEAN Circulate 2 1/2 open hole volumes at 2 bbl/min 85 gpm 88 psi. Up wt. 180k. S/O 85k. Mud wt. In 8.9 ppg. Out 8.9 ppg. Utilize Hot Oil to heat 8.9 ppg SF Flo-Pro mud. Temp In 112 degrees. Out 97 degrees. CLEAN Pull out of the hole from 6033' to 9 5/8" casing shoe at 4294' at 35 ft/min. No problems. Printed: 10/25/2006 10:02:55 AM • i Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 10/15/2006 05:30 - 12:00 6.50 CLEAN P CLEAN Circulate and condition mud leaving drill string stationary until the first open hole volume was seen come across shale shakers at 240 gpm, 193 psi. Stage flow rate up to 600 gpm 857 psi. Rotate reciprocating drill string. Alternating area rotated by standing back 1 stand every hour. 80 rpm, 7k tq Up wt. 110k S/O wt. 65k. Mud wt. In 8.9 ppg. Out 8.9 ppg. Utilize Hot Oil to heat 8.9 ppg SF Flo-Pro mud. Temp In 105 degrees. Out 97 degrees. Circulate 6 BU before mud would pass , Weatherfords 150 micron production screen test. , 12:00 - 17:30 5.50 CLEAN P CLEAN Back ream from 4235' to 644' to assit in hole cleaning at 30 I ~ ft/min, 600 gpm, 830 psi, 70 rpm, 6.6k tq. 17:30 - 19:30 2.00 CLEAN P CLEAN Monitor wellbore. PJSM. Stand back 5" HWDP. Lay down Jar, Float sub, NM sprial dc, NM stab, 2 NM sprial dc, Near bit stab and 8 1/2" bit. Clear & clean rig floor. 19:30 - 21:00 1.50 BOPSU P RUNPRD Pull wear bushing. Rig up 7" test jt. Change top pipe rams from 3 1/2" x 6" to 7" hard body rams. 21:00 - 21:30 0.50 BOPSU P RUNPRD Test door seals to 3500 psi. Teast 7" rams to 3500 psi. , 21:30 - 22:00 0.50 BOPSU P RUNPRD Rig down 7" test jt. and test equipment. Pull test plug and install wear bushing. '~ 22:00 - 00:00 2.00 CASE P RUNPRD PJSM. Rig up Nabors 7" torque turn equipment. ' 10/16/2006 00:00 - 04:00 4.00 CASE P RUNPRD Run 7" Vam Top HT left hand screen assy. consiting of Bull ~~ nose, (2) 7" blank pup jts. 7" Sand screen, (4) 7" Blank pup jts. I ~ 7" Sand screen, (3) 7" blank pup jts. (2) 7" Sand screens, (2) EZI pup jts. (Zonal isolation Pkr) = 269' at 60 Wmin. Average make up torque 13,000 ft/pd. (9) 5.25 OD Centralizers ran on screen assy. 04:00 - 09:30 5.50 CASE P RUNPRD Run 7" 29# Vam Top HT left hand liner to 2325' at 60 ft/min. 09:30 - 12:00 2.50 CASE P RUNPRD Change out hanlding equipment. Make up Weatherfords liner top packer assy. Rig down Nabors casing torque turn equipment. 12:00 - 12:30 0.50 CASE P RUNPRD Circulate at 13 3/8" x 9 5/8" casing X-O pre Weatherford rep. 90 gpm, 70 psi. Up wt. 180k, S/O wt. 73k. 12:30 - 17:00 4.50 CASE P RUNPRD Run in the hole with 7" screen assy. Picking up 4" HT-38 I HW DP and 4 3/4" HT-38 Drill collars from pipe shed to 3710' at j 60 fVmin. I 17:00 - 18:00 1.00 CASE P RUNPRD Run in the hole picking up 4" HT38 HW DP from 3710' to 4286' at 60 ff/min. 18:00 - 18:30 0.50 CASE P RUNPRD Breaking circulation above 9 5/8" casing shoe at 4294'. 21 gpm, 72 psi. Up wt. 120k. S/O wt. SOk. 18:30 - 19:00 0.50 CASE P RUNPRD Run in the hole from 4286' to 4708' at 60 Wmin picking up 4" HT-38 HWDP from pipe shed. Up wt 135k. S/O wt. 80k. 19:00 - 20:30 1.50 CASE N DPRB RUNPRD Run in the hole to 4712'. Setting 25k down. Break circulation at 50 pgm 105 psi. Work 7" screen assy from 4704' to 4712'. Numerous attempts to work past 4712' with the same results. String would break over at 155k and return to normal up weight of 130k with the S/O weight at 80k. ', 20:30 - 21:00 0.50 CASE N DPRB RUNPRD Pull out of the hole from 4712' to 4294'. Consulant with town I and the UK. I Weatherfords UK rep advised setting 50k down wt. on screen assy/bull nose. Slight rotation of pipe was not advised due to screen shrouds. 21:00 - 21:30 0.50 CASE N DPRB RUNPRD Run in the hole from 4294' to 4712'. Again setting 25k down. Break circulation at 50 pgm 105 psi. Work 7" screen assy from Printed: 10/25/2006 10:02:55 AM ~ . Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 10/16/2006 21:00 - 21:30 0.50 CASE N DPRB RUNPRD 4704' to 4712'. Working down wt. in 5k incerments up to 50k down wt. Numerous attempts to work past 4712' with the same results. String would break over at 155k and return to normal up weight of 130k with the S/O weight at 80k. 21:30 - 00:00 2.50 CASE N DPRB RUNPRD Monitor wellbore f/ 10 min. Pull out of the hole from 4712' to 2606' at 45 ft/min. ,10/17/2006 00:00 - 00:30 ~0.50 CASE N DPRB RUNPRD Pull out of the hole from 2606' to 2324' at 45 ft/min. ' 00:30 - 02:00 1.50 CASE N DPRB RUNPRD PJSM. Rig up Nabors casing torque turn equipment. I~ 02:00 - 02:30 0.50 CASE N DPRB RUNPRD PJSM. Lay down Weatherfords 9 5/8" liner top packer assy. Change out handling equipment. 02:30 - 08:30 6.00 CASE N DPRB RUNPRD Lay down 7" 29# Vam Top HT left hand liner. 08:30 - 12:00 3.50 CASE N DPRB RUNPRD PJSM. Lay down 7" 29# Vam Top HT left hand screen assy. No damge to centralizers. Last sand screen partial pluged and some damage to screen shroud from riding on the low side of wellbore while pulling out of the hole. Recovered all 9 centralizers. 12:00 - 14:30 2.50 CASE N DPRB RUNPRD Mobilize another set of casing tongs to break 7" bull nose from 7" blank pup jt. Rig down Nabors casing torque tum equipment. 14:30 - 16:00 1.50 CASE N DPRB RUNPRD PJSM. Remove 7" bull nose from 7" blank pup jt. Make up 4 , 1/2" silver bullet floaUmule shoe, 4 1/2" IBT L-80 pup jt, 4 1/2" x 7" Vam Top HT LH X-O. Fill silver bullet float with baker loc. 16:00 - 18:00 2.00 CASE N DPRB RUNPRD Weatherford reps unceratin that baker loc would keep fluid ' from traveling up the screen assy. Remove silver bullet , floaVmu~e shoe and blank off by welding a ring inside silver ' bullet floaUmule shoe. ', 18:00 - 20:30 2.50 CASE N DPRB RUNPRD Make up silver bullet floaUmule shoe to 4 V2" 12.6# IBT L-80 I pup. Rig up Nabors casing torque turn equipment. Run 7" Vam Top HT left hand screen assy at 60 ff/min. Clean and inspect threads. Average Make up torque 13,000 ft/pd. (10) 8.25 OD Centralizers ran on screen assy. 20:30 - 00:00 3.50 CASE N DPRB RUNPRD Run 7" 29# Vam Top HT left hand liner to 2198' at 60 ft/min. Average make up torque 13,000 ft/pd. Up wt. 75k. S/O wt. 70k. 10/18/2006 00:00 - 00:30 0.50 CASE N DPRB RUNPRD Run 7" 29# Vam Top HT left hand liner to 2339' at 60 ft/min. Average make up torque 13,000 ft/pd. 00:30 - 01:00 0.50 CASE N DPRB RUNPRD Change out handling equipment. Make up Weatherfords liner top packer assy. 01:00 - 03:00 2.00 CASE N DPRB RUNPRD Rig down Nabors casing torque turn equipment. 03:00 - 03:30 0.50 CASE N DPRB RUNPRD Circulate at 13 3/8" x 9 5/8" casing X-O pre Weatherford rep. 90 gpm, 70 psi. Up wt. 80k, S/O wt. 73k. 03:30 - 06:30 3.00 CASE N DPRB RUNPRD Run in the hole with mixed string of 4" HT-38 HW DP and 4 3/4" HT-38 drill collars. Break circulation at 9 5/8" casing shoe 4294'. 35 gpm, 88 psi. Change handling equipment to 5". Up wt. 130k. S/O wt. 80k. Run in the hole with 5" dp. Taking 15k down wt. at 4682' work screen assy thru. Taking 20k down wt. at 4692' weight returned to normal S/O wt. of 80k. Taking 25k down wt. at 4702'. This area required picking up and breaking string over at 155k up wt. to work screen assy thru. Taking 30k down wt. at 4715'. Setting a max down wt. of 40k. No futher down movement of screen assy. Pick up slowly until drill string broke over at 30k over pull. Note: 30k overpull max as pre Weatherford rep before a problem could occur with liner top packer. Printed: 10/25/2006 10:02:55 AM i • Legal Well Name: Common Weil Name Event Name: Contractor Name: , Rig Name: S-401 S-401 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS7ES Spud Date: 9/16/2006 Start: 9/15/2006 End: 10/20/2006 Rig Release: 10/25/2006 Rig Number: 10/18/2006 06:30 - 07:30 1.00 CASE N 07:30 - 08:30 1.00 CASE P 08:30 - 09:00 0.50 CASE P 09:00 - 11:00 2.00 CASE N ', 11:00 - 13:00 2.00 CASE N I 13:00 - 13:30 0.50 CASE N 13:30 - 16:30 3.00 CASE N 16:30 - 19:00 2.50 CASE N 19:00 - 20:30 1.50 CASE N 20:30 - 21:30 1.00 BOPSU P 21:30 - 22:30 22:30 - 00:00 I 10/19/2006 I 00:00 - 03;30 03:30 - 04:30 04:30 - 05:00 05:00 - 09:00 09:00 - 12:00 12:00 - 12:30 12:30 - 13:30 13:30 - 14:30 1.00 CIEAN N 14:30 - 15:30 1.00 CLEAN N 15:30 - 20:30 5.00 CLEAN N DPRB RUNPRD Pull out of the hole to 4176'. Monitor wellbore. RUNPRD Slip and cut 179' of drilling line. RUNPRD Service top drive. DPRB RUNPRD Pull out of the hole w/ mixed string of 4 3/4" HT-38 dc and 4" HT-38 HW DP to 2341'. DPRB RUNPRD Rig up Nabors casing torque turn equipment. DPRB RUNPRD Lay down Weatherfords 9 5/8" liner top packer. Change out handling equipment. Rig up compensator. DPRB RUNPRD PJSM. Lay down 7" 29# Vam Top HT left hand liner. DPRB RUNPRD PJSM. Lay down 7" 29# Vam Top HT left hand screen assy. No damge to centralizers. Recovered all 10 centralizers. No damage to sand screens. DPRB RUNPRD Rig down Nabors casing torque turn equipment. Break Circulation sub from screen expansion tool for Weatherford. RUNPRD PJSM. Change top pipe rams #rom 7" hard body rams to 3 1/2" x 6" var rams. RUNPRD Pull wear bushing. Install test plug. Rig up test equipment. RUNPRD Test BOP 250 psi low 3500 psi high. Wittness of BOP test wavied by AOGCC rep Jeff Jones. Test wittnessed by WSL Wade Frame and Toolpusher Lenward Toussant. RUNPRD Test BOP and associated valves to 250 psi low 3500 psi high. W ittness of BOP test wavied by AOGCC rep Jeff Jones. Test wittnessed by WSL Wade Frame and Toolpusher Lenward Toussant. 1.00 BOPSU P 1.50 BOPSU P 3.50 BOPSU P Note. TIW Valve/Saver sub on top drive failed to test. RUNPRD Rig down test equipment. Pull test plug and install wear bushing. Change out and test TIW/Saver sub to 250 psi low. 3500 psi high. DPRB CLEAN PJSM. Bring tools to rig floor. Strap and caliper the same. DPRB CLEAN Make up clean out assembly. BHA #25. Consiting of RR #14 Smith 6 1/8" bit w/ open jets, Bit sub, X-O, 8 1/2" Ghost reamer, X-O, Float sub, MWD, ADN, NM sprial dc, 8 1/2" NM stab, NM spria! dc, Hold PJSM, Load source in ADN. Jar, 2 X-O. = 167' Shallow pulse test MWD 405 gpm, 226 psi. Good test. DPRB CLEAN Run in the from 167' to 4245'. Filling dril- pipe. Pulse test MWD. 413 gpm 1067 psi. Up wt. 115k. S/O wt. 65k. Install blower hose. DPRB CLEAN Run in the hole from 4245' to 4715'. Up wt. 165k. S/O wt. 65k. DPRB CLEAN Taking 30k down wt. at 4715'. Pick up. String breaking over at 4660'. Well sticky and attempting to pack off. Ream thru interval at 4715', Ok once ghost reamer passed 4715'. Continue to ream all stabs across 4715' to a bit depth of 4805'. 408 pgm 1145 psi, 60 rpm, 10k tq. Rot wt. 85k. Mud wt. In 9.0 ppg. Out 9.0 ppg. DPRB CLEAN Mad Pass from 4805' to 4700'. Backreaming at 415 gpm, 1200 psi, 60 rpm, 9.5k tq. DPRB CLEAN Run in the hole from 4700' taking 20k wt: at 4907'. 150k up wt. S/O wt. 65k. DPRB CLEAN Ream tight spot from 4900' to 4952'. 202 gpm, 1028 psi, 70 rpm, 9.5k tq. WOB 10k V 15k. Well attempting to pack off and 1.00 BOPSU P 0.50 CLEAN N 4.00 CLEAN N 3.00 CLEAN N 0.50 CLEAN N 1.00 CLEAN N Printed: 10/25/2006 10:02:55 AM ~ • Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 10/19/2006 15:30 - 20:30 5.00 CLEAM1J (V DPRB CLEAN string becoming sticky. Lost circulation breifly at 4952'. Consuit with engineering in town about wellbore instabiliry. Permission granted to increase mud wt. once back on bottom. Continue reaming to 5020'. Survey taken at 5020' indicates wellbore side tracked. Backream from 5002 to 4907'. 235 gpm, 513 psi, 70 rpm, 9.5k tq. Run in the hole with out pumps and no rotation to 5002' with out any problems. Pull out of the hole to 4900' taking 3 surveys ai 30' intervals. 2 of the 3 surveys indicate that wellbore was side tracked on the high side of orginal well bore. Attempt to re entry orginal welibore with no success. Well side tracked between 4905' and 4940'. Consult with engineering in town. 20:30 - 22:30 2.00 CLEAN N DPRB CLEAN Pull out of the hole from 4900 to 4245'. Monitor wellbore. Remove blower hose. Pump dry dry. Continue to pull out of the hole from 4245' to 2547'. Standing back 5" dp in derrick. 22:30 - 00:00 1.50 CLEAN N DPRB CLEAN PJSM. Lay down 4" HT-40 HWDP and 4" HT-38 HWDP from 2547' to 1550'. 10/20/2006 00:00 - 00:30 0.50 CLEAN N DPRB CLEAN Lay down 4" HT-40 HWDP and 4" HT-38 HWDP from 1550' to 1454'. 00:30 - 04:30 4.00 CLEAN N DPRB CLEAN Lay down 4" HT-38 HW DP and 4 3/4" HT-38 drill colfars to 167'. 04:30 - 06:30 2.00 CLEAN N DPRB CLEAN Lay down clean out BHA, 2 X-O, Jar, NM spiral dc, NM stab, NM spiral dc, ADN, MWD, Float sub, X-O, 8 1/2" ghost reamer, X-O, Bit sub, Bit. PJSM held pior to removing source from ADN. 06:30 - 08:00 1.50 CLEAN N DPRB CLEAN Clean and clear rig floor. Down load MW D in pipe shed. 08:00 - 11:30 3.50 STKOH N DPRB PROD1 Pick up BHA #26 consiting ot Hughes MXL-1 8 1/2" bit, XP motor at 1.5 degrees, ARC, MWD, NM X-O, NM stab, (2) NM spiral dc, NM stab, (1) NM sprial dc, Float sub, Jar, (17) 5: HWDP.= 717'. Shallow pulse test MWD at 301'. 534 gpm, 1800 psi. Decision from town as to not run Schlumbergers ADN too~. 11:30 - 14:30 3.00 STKOH N DPRB PROD1 Run in the hole from 717' to 4213'. Fill pipe. Install blower hose. 14:30 - 15:00 0.50 STKOH P PROD1 Service top top drive. 15:00 - 16:30 1.50 STKOH N DPRB PROD1 Run in the hole from 4213' to 4350'. Obtain slow pump rates and establish an ECD base line of 10.47 ppg. 460 gpm, 888 psi. 16:30 - 17:30 1.00 STKOH N DPRB PROD1 Trenching for open hole side track from 4350' to 4400' on the low side of welibore. Up wt. 120k. S/O wt. 55k. 450 gpm, 947 psi. Up wt. 115k. S/O wt. 55k. 17:30 - 19:30 2.00 STKOH N DPRB PROD1 Time drilling 8 1/2" open hole side track from 4400' to 4430'. Up wt. 130k. S/O wt 60k. WOB 10k. 470 gpm, 966 psi. 19:30 - 00:00 4.50 DRILL N DPRB PROD1 Directional drifl 8 1/2" hole from 4430' to 4972'. Up wt. 135k, S/O wt. 63k, Rot. wt. 88K, Rpm 80, Tq on 8.5k, off 8k, WOB 25k, 481 gpm, 1140 psi on, 1060 psi off. Mud wt. In 9.0 ppg. Out 9.1 ppg. Confriming open hole side track with survey at 4437.72'. Calculated ECD = 9.67 ppg. Actual ECD = 10.09 ppg at 23:59 / 4972'. ART = 1.6 hrs. AST = 2.6 hrs ADT = 4.2 hrs. Jar = 71.7 hrs. 10/21/2006 00:00 - 00:30 0.50 DRILL N DPRB PROD1 Rotate and recipocate pipe due to high ECDs. Calculated ECD Printed: 10/25/2006 10:02:55 AM ~ ~ . Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/2Q/2006 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 10/21/2006 00:00 - 00:30 0.50 DRILL N 00:30 - 12:00 11.50 DRILL N 12:00 - 16:30 I 4.501 DRILL I N DPRB PROD1 = 9.66 ppg. Actual ECD = 10.70. 480 gpm, 1059 psi. 70 Rpm, 8k Tq. DPRB PROD1 Directional drill 8 1/2" hole from 4972' to 6012'. Up wt. 185k, S/O wt. 75k, Rot. wt. 104K, Rpm 80, Tq on 12 U 13k off 8k, WOB 20k, 481 gpm, 1362 psi on, 1230 psi off. Mud wt. In 9.0 ppg. Out 9.1 ppg. Encountering Hydrates at 5279' MD 3055' TVD. Calculated ECD = 9.67 ppg. Actual ECD = 10.09 ppg ART = 2.63 hrs. AST = 3.47 hrs ADT = 10.77 hrs. Jar = 78.3 hrs. DPRB PROD1 Directional drill 8 1/2" hole from 6012' to 6566'. Up wt. 215k, '~ S/O wt. 80k, Rot. wt. 112K, Rpm 80, Tq on 12k off 16k, WOB 20k, 481 gpm, 1380 psi on, 1182 psi off. Mud wt. In 9.0 ppg. Out 9.1 ppg. Calculated ECD = 10.14 ppg. Actual ECD = 10.3 ppg at 23:59 16:30 - 18:30 I 2.00 ~ DRILL I N 18:30 - 19:30 19:30 - 00:00 10/22/2006 00:00 - 00:30 00:30 - 01:00 01:00 - 03:00 03:00 - 04:00 04:00 - 08:00 08:00 - 09:30 09:30 - 10:30 10:30 - 14:00 14:00 - 16:00 1.00 DRILL N 4.50 DRILL N 0.50 DRILL N 0.50 DRILL N 2.00 DRILL N 1.00 DRILL N 4.00 DRILL N 1.50 DRILL N 1.00 DRILL N 3.50 DRILL N 2.00 BOPSU N / 6566' MD 4036' ND. ART = 2.95 hrs. AST = 0.42 hrs ADT = 14.14 hrs. Jar = 81.6 hrs. DPRB PROD1 Circulate and condition mud. Pumping 2 bottoms up. 503 gpm, 1282 psi. 80 Rpm, 13k tq. Mud wt. In 9.1 ppg. Out 9.2 ppg. DPRB PROD1 Obtain SPR. Remove ice from the derrick. Monitor welibore. DPRB PROD1 Pull out of the hole from 6566 to 6387'. Encountered 25 to 35k over pulls from 6407' to 6400' and 45k over at 6370'. W ipe tight areas. Well swabbing. Backream from 6387' U 4403' at 450 gpm, 1110 psi. 70 Rpm, 13 U 14k tq. DPRB PROD1 Backream from 4403' U 4294' at 450 gpm, 1110 psi. 70 Rpm, 13 U 14k tq. Actual ECDs while backreaming to 9 5/8" casing shoe 10.47 PP9 ~ 11.5 PP9• DPRB PROD1 Circulate bottoms up while rotating and reciprocating pipe from 4294' U 4213' at 501 gpm 1060 psi, 80 Rpm, 7 U 9k tq. 100% in cuttings at bottoms up. Mud wt. in 9.1 ppg. Out 9.2 ppg. DPRB PROD1 Run in the hole from 4294' to 6248'. without any problems. Taking 45k down wt. at 6248'. W ash from 6220' to 6270' at 193 gpm 520 psi. 60 Rpm, 14 U 15k tq. Continue in the hole U 6566' with out any more problems. DPRB PROD1 Circulate and condition mud. Pump 27 bbl 2 ppg over weighted sweep around at 475 gpm, 1201 psi, 80 Rpm, 17k tq. Rot wt. 120k. Sweep brought back 4 x the normal cuttings. Mud wt. In 9.1 PP9. Out 9.1 pP9• DPRB PROD1 Pull out of the hole from 6566' U 2323'. Drop 3" drift at 4294' 9 5/8" casing shoe. Encountered no hole problems while pulling out of the hole. DPRB PROD1 Circulate bottoms up at 9 5/8" x 13 3/8" casing cross over. 3 x the cuttings at bottoms up shale and coal. Remove blower hose and blow down top drive. DPRB PROD1 Pull out of the hole from 2323' to BHA #26 at 717'. DPRB PROD1 Lay down BHA #26 (17) 5" HWDP, Jar, Float sub, NM spiral dc, NM sta, (2) NM stab, NM stab, NM X-O, MWD, ARC, XP motor and bit. Down load MWD in pipe shed. DPRB RUNPRD PJSM. Pull wear bushing. Install test plug. Remove 3 1/2" x 6' var from upper pipe rams. install 7" hard body rams. Rig up up Printed: 10/25/2006 10:02:55 AM ~ ~ Legal Well Name: Common Well Name Event Name: Contractor Name: Rig Name: I 10/22/2006 14:00 - 16:00 16:00 - 18:00 18:00 - 00:00 ' 10/23/2006 00:00 - 01:00 ', 01:00 - 02:00 02:00 - 02:30 S-401 S-401 DRILL+COMPLETE NABORS ALASKA DRILLING I NABORS 7ES 2.00 BOPSU N 2.00 BOPSU N 6.00 CASE N 1.00 CASE N 1.00 CASE N 0.50 CASE N Spud Date: 9/16/2006 Start: 9/15/2006 End: 10/20/2006 Rig Release: 10/25/2006 Rig Number: DPRBIRUNPRD DPRB RUNPRD DPRB RUNPRD DPRB RUNPRD DPRB RUNPRD DPRBIRUNPRD 02:30 - 04:00 1.50 CASE N DPRB RUNPRD 04:00 - 05:00 1.00 CASE N DPRB RUNPRD 05:00 - 05:30 0.50 CASE N DPRB RUNPRD 05:30 - 06:30 1.00 CASE P RUNPRD 06:30 - 07:30 1.00 CASE P RUNPRD 07:30 - 08:00 0.50 CASE P RUNPRD 08:00 - 11:00 I 3.001 CEMT I P I I RUNPRD 11:00 - 12:00 I 1.001 CEMT I P I I RUNPRD 12:00 - 13:00 1.00 CEMT P RUNPRD 13:00 - 14:30 1.50 CEMT P RUNPRD i4:30 - 19:00 4.50 CEMT P RUNPRD 19:00 - 20:00 1.00 CEMT P RUNPRD 20:00 - 22:00 2.00 CEMT P RUNPRD 22:00 - 00:00 I 2.001 BOPSUR P I I RUNCMP test equipment and test door seals to 3500 psi. Test 7" rams to 250 psi low and 3500 psi high. Rig down test equipment. Pull test plug. Install wear bushing. PJSM. Rig up Nabors casing torque turn equipment. Run 7" 26# L-80 TC-II liner to 2379'. Check floats. Ran 59 Joints. Placing centralizers on joints 1 thru 55 and 58 to 59. Average make up toqure 10,100 fUpd. Up wt. 74k. S/O wt. 62k. Remove compensator and long bails. Install short bails. Make up Bakers HR ZXP liner top packer. Change out handling equipment. Rig down Nabors casing equipment. Run in the hole with 1 stand 5" dp. Circulate 1 1/2 times the liner volume at 255 gpm, 121 psi. Up wt. 80k. S/O wt. 65k Run in the hole with 7" liner on 5" dp to 4292'. Filling every 10 stands of dp ran. Record Up and Dwn wt. every 5 stands ran. Circulate bottoms up staging pump up from 40 spm, 120 gpm, 184 psi. 55 spm, 164 gpm, 189 psi, to 84 spm, 258 gpm, 252 psi. Up wt 100k. S/O wt. 55k. Run in the hole with 7" liner on 5" dp. to 4715'. Run in the hole with 7" liner on 5" dp to 6551'. No problems. Make up Bakers TD cementing head and tag bottom at 6566' Circulate and condition mud while reciprocating pipe. 252 gpm, 700 psi. Up wt. 165k. S/O wt. 70k. PJSM held with Schlumberger/Dowell while circulating 3 open hole volumes. Test lines to 4000 psi. Pump 40 bbf Mud push at 10.3 ppg. Mix and pump 65 bbls of 12.5 ppg cement at 6 bbl/min. Mix and pump 21 bbls of 15.8 ppg cement at 6 bbl/min. Wash up cement line thru tee at rig floor. Drop drill pipe wiper dart. Pump 90 bbis of fresh water. Switch to rig pump and bump plug with 69 bbls of 9.1 ppg Pro-Flo mud. Increase pressure to 3500 psi to set Bakers liner hanger. Bleed off pressure, check floats. Set 40k down wt. to confrim liner hanger set. Pick up to 200k, Hanger did not set. Set 40k down on hanger, pressure up to 3500 psi. Bleed off pressure and pick up to 70k. Confrim hanger set with weight loss. Pick up 8' expose dog sub set down string weight to set ZXP packer. Pick up 10' and rotate string. Set down string weight. Good surface indication that ZXP packer set. Pressure loss observered while pack off was pulled out of extension, increase pump rate to 12 bbl/min. Note: Pipe was reciprocated until lead cement turned to corner at 6564' 7' casing shoe. CIP at 09:58 hrs. 7" Liner Top at 4152'. Circulate out excess cement at 12 bbl/min. High PH at surface. No cement. Displace wellbore to 8.5 ppg seawater at 460 gpm, 890 psi. PJSM. Break and lay down TD cementing head. Pull out of the hole laying down 5" drill pipe from 4116' to 60'. Run in the hole with excees drill pipe from the derrick to 1940'. Pull out of the hole laying down 5" drill pipe and running tool. Inspection of liner running tool showed that dogs had sheared. PJSM. Pull wear bushing. Install test plug. Remove 7" hard body rams. Install 3 1/2" x 6' var in upper pipe rams. Rig up up test equipment. Printed: 10/25/2006 10:02:55 AM ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: DRILL+COMPLETE Start: 9/15/2006 End: 10/20/2006 Contractor Name: NABORS ALASKA DRILLING i Rig Release: 10/25/2006 Rig Name: NABORS 7ES Rig Number: 10/24/2006 00:00 - 01:30 1.50 BOPSU P RUNCMP Test door seals to 3500 psi. Test 3 1/2" x 6" var. rams to 250 ' psi low and 3500 psi high. Rig down test equipment. Pull test plug. ', 01:30 - 03:00 1.50 BOPSU P RUNCMP Rig up and test 7" casing to 3500 psi. First test failed due to !~ surface leak. Locate and isolate surface leak. Retest 7" casing ' to 3500 psi for 30 minutes. Good test. 03:00 - 04:00 1.00 RUNCO RUNCMP Make dummy run with 13 3/8" x 4 1/2" Yubing hanger. 04:00 - 09:30 5.50 P TUBHGR Run 4 1/2" 12.6# L-80 NSCT tubing/kill string, with 4 1/2" mule shoe to 2488'. PU wt. 50K. SO wt. 45K. PU landing jt. and hanger and land hanger at 25.60' below KB. Install TWC. Test same. 09:30 - 11:30 2.00 P RUNCMP ND BOP stack. 11:30 - 15:00 3.50 WHSUR P RUNCMP NU adaptor flange and tree. FMC tested tbg. hanger and adaptor flange to 5K psi/10min. 15:00 - 17:00 2.00 WHSUR P RUNCMP Wait on DSM to mobilize equipment to function LE0 valve. 17:00 - 19:00 2,00 WHSUR P RUNCMP Test tree to 5000 psi. for 10 mins. 19:00 - 20:00 1.00 WHSUR P RUNCMP Pull TWC w/DSM lubricator. 20:00 - 21:00 1.00 WHSUR P RUNCMP PJSM and RU Hot Oil Service to pump diesel for freeze protecion. 21:00 - 23:00 2.00 WHSUR P RUNCMP Pressure test Hot Oil lines to 3500 psi. and reverse circulate 320 bbls. diesel down annulus. 85 gpm, 220 psi. 23:00 - 00:00 1.00 WHSUR P RUNCMP RU hose and allow diesel to U-tube from annulus to tubing. 10/25/2006 00:00 - 02:30 2.50 WHSUR P WHDTRE Continue to allow diesel freeze protection to u-tube. Set BPV and test f/below to 1000 psi. RD DSM lubricator and Hot Oil. Release rig at 02:00 Oct 25, 2006 02:00 - 06:00 4.00 WHSUR P WHDTRE Secure well and cellar. Move pits away f/sub. RD and pull rig away from well. Mobilize crane and remove diverter f/cellar area. Move to S-124i. ~Ps ~~j6~~~ ~aa o~ Printed: 10/25/2006 10:02:55 AM ~ ~ 'Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: WORKOVER Start: 6/13/2007 End: 6/23/2007 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 6/23/2007 Rig Name: NABORS 9ES Rig Number: 6/13/2007 04:00 - 09:00 5.00 RIGD P PRE Pressure wash mud pits in preparation for S-401. 09:00 - 12:00 3.00 RIGD P PRE Rig down. Bridle up and lower derrick, prepare cellar while moving shops and satellite camp to S-pad. Waited 1 hr for broken down Veco truck to be removed from S-pad to set down shops and camp. 12:00 - 14:00 2.00 MOB P PRE Move pit complex away from rig. Install jeep to pit 5th wheel. Move to Z-pad turn-off. 14:00 - 15:00 1.00 MOB P PRE Move rig off of V-222i. Remove rig matts. Pick up herculite. Remove surface hydrii from cellar. 15:00 - 16:00 1.00 MOB P PRE Move sub to Z-pad tum-off. 16:00 - 19:00 3.00 MOB P PRE Wait for completion of matting board staging on Spine road. 19:00 - 00:00 5.00 MOB P PRE Move pits and sub to S-pad. 'Accepted rig ~ 21:00 hr, 6/13/2007. Time rolled back and adjusted 9 hrs from 06:00 hr, 6/14/2007, due to pre-cleaning of pits and matting board staging. 6/14/2007 00:00 - 01:00 1.00 MOB P PRE Position rig near S-401. Lay down matting boards. 01:00 - 02:00 1.00 MOB P PRE PJSM. Raise derrick. 02:00 - 03:30 1.50 MOB P PRE Spread herculite. Spot sub and pits. 03:30 - 06:00 2.50 RIGU P PRE Connect lines at interconnect. Bridle down and rig up rig floor. 'Accept rig ~ 21:00 hrs, 6/13/2007. Time rolled back 9 hrs from 06:00 due to pre pit cleaning and staging matting boards. 06:00 - 14:30 8.50 WHSUR P DECOMP Rig up circulating lines to displace weli. Take on seawater. Load pipe shed with drillpipe and HWDP. Strap same. Rig up highline power to rig. No pressure on kill string annulus. 14:30 - 15:00 0.50 WHSUR P DECOMP Rig up DSM lubricator, puli BPV. No pressure on kill string. Rig down lubricator. 15:00 - 17:30 2.50 KILL P DECOMP Circulate and displace out diesel from well with 8.4 ppg seawater. 154 gpm, 45 psi ICP, 155 psi FCP. 17:30 - 18:00 0.50 KILL P DECOMP Rig down circulating equipment. Blowdown lines. 18:00 - 18:30 0.50 WHSUR P DECOMP Install 2-way check valve. Test same to 1,000 psi from below - OK. 18:30 - 19:30 1.00 WHSUR P DECOMP Nipple down tree with LEO, nipple down adapter flange. 19:30 - 00:00 4.50 BOPSU P DECOMP Change out adapter spool on BOP stack to a 13 5/8" spacer spool. Nippie up BOPE. 6/15/2007 00:00 - 00:30 0.50 BOPSU P DECOMP Rig up to test BOPE. 00:30 - 04:00 3.50 BOPSU P DECOMP Pressure test BOPE to 250 psi low, 3,500 psi high. Test Accumulator drawdown. Witnessing of test waived by AOGCC rep Chuck Sheve. Test witnessed by BP WSL R. French, NAD TP B. Tiedemann. 04:00 - 04:30 0.50 BOPSU P DECOMP Rig down BOPE test equipment. 04:30 - 07:30 3.00 PULL P DECOMP Rig up DSM lubricator and rig ~p to pull kill string. Pull 2-way check. Rig down lubricator. 07:30 - 08:00 0.50 PULL P DECOMP Back out lock down screws. Pull hanger to rig floor. PU - 55k, SO - 46k. 08:00 - 08:30 0.50 PULL P DECOMP Circulate surtace to surface ~ 500 gpm, 285 psi. 08:30 - 09:00 0.50 PULL P DECOMP Laydown 7" hanger and landing joint. 09:00 - 13:00 4.00 PULL P DECOMP POH laying down 4.5" 12.6# L-80 NSCT tubing kill string from 2,500' to surtace. Recovered 60 joints. 13:00 - 14:00 1.00 PULL P DECOMP Rig down tubing pulling equipment. Install wear bushing. Printed: 7/10/2007 12:02:31 PM , ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: WORKOVER Start: 6/13/2007 End: 6/23/2007 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 6/23/2007 Rig Name: NABORS 9ES Rig Number: 6/15/2007 I 14:00 - 16:00 I 2.001 CLEAN I P I I CLEAN 16:00 - 18:00 2.00 CLEAN P CLEAN 18:00 - 23:30 5.50 CLEAN P CLEAN 23:30 - 00:00 I 0.501 CLEAN I P I I CLEAN 16/16/2007 I 00:00 - 00:30 I 0.501 CLEAN I P I I CLEAN 00:30 - 01:00 I 0.50I CLEAN I P I I CLEAN 01:00 - 02:00 I 1.001 CLEAN I P I I CLEAN 02:00 - 02:30 0.50 CLEAN P CLEAN 02:30 - 03:00 0.50 CLEAN N WAIT CLEAN 03:00 - 06:00 I 3.001 CLEAN I P I I CLEAN 06:00 - 08:30 2.50 CLEAN N WAIT CLEAN 08:30 - 12:30 4.00 CLEAN P CLEAN 12:30 - 13:30 1.00 CLEAN N WAIT CLEAN 13:30 - 17:30 4.00 CLEAN P CLEAN 17:30 - 20:00 I 2.501 CLEAN I P I I CLEAN 20:00 - 23:00 I 3.00 I CLEAN I N I SFAL I CLEAN Pick up cleanout BHA: New 6 1/8" HTC, ATJ-4 bit, bit sub, 2 ea casing scrapers, bumper sub, oit jars, xo, 9ea 4 3/4" DC's, 24 ea 4" HWDP. Pick up 30 joints of 4" drillpipe and stand back in derrick. Run in hole with cleanout BHA, picking up singles, from 1,041' to 6,014'. Used mustache brush for lightly doping pin end on pipe. Wiped off excess dope after make-up. Run in hole with pipe out of derrick from 6,014' to 6,397'. Make up topdrive and run in hole from 6,397' to tag up ~ 6,452'. PU - 140k, SO - 75k. Attempt to wash down on tag up @ 6,452' without success. Clean oui from 6,452' !0 6,468'. Stopped ~ 6,468 when it would not drill off with 25k WOB. 126 gpm, 300 psi 40 rpm, 7.3k TQ PU - 140k, SO - 75k, 112k - RWT, 10-25k - WOB. Blowdown topdrive and rig up to reverse circulate straight to flowline. Reverse circulate 289 bbls of clean, filtered, 140 deg seawater. 10 bpm, 2,500 psi. 'Bottoms up brought up a significant amount of cement to surface foilowed by dirty, stinky water. Rig down reverse circulating line. Make up topdrive and work pipe up and down 1 stand. Wait on Peak Vac trucks. 'Vac truck shortage. Pad 3 has been closed causing a backload of trucks waiting to off-load. 30 trucks waiting at latest count. Reverse circulate 20 bbl, 10% SafeSurt pill with 3 ppb FloVis, followed by 541 bbls of 8.5 ppg, 140 deg filtered seawater. 3 bpm, 265 psi while in annulus. 5 bpm, 515 psi while going up drillpipe Shut down pumping to rotate and reciprocate fuil stand occasionaliy. Seawater ~ 250 NTU's. Did not filter returns this circulation. Wait on Peak Vac trucks. Reverse circulate 20 bbl, 10% SafeSurt pill with 3 ppb FloVis, foilowed by 541 bbls of 8.5 ppg, 140 deg filtered seawater. 3 bpm, 265 psi while in annulus. 5 bpm, 515 psi while going up drillpipe Shut down pumping to rotate and reciprocate full stand occasionally. Seawater ~ 40 NTU's. Did not filter retums this circulation. Wait on Peak and Veco Vac trucks. Off-load seawater to brine tanks. Clean pits. Take on 9.1 ppg filtered brine to mudpits. Reverse circulate 2% KCL 9.1 ppg NaCi brine. 5 bpm, 690 psi. Shut down pumping to rotate and reciprocate full stand occasionally. Filtering returns. MI fluid filtration unit developed a leak in a PVC connection due to a poorly bonded glue. Repair leak. Printed: 7/10/2007 12:02:31 PM ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: WORKOVER Start: 6/13/2007 End: 6/23/2007 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 6/23/2007 Rig Name: NABORS 9ES Rig Number: 6/16/2007 I 23:00 - 00:00 6/17/2007 I 00:00 - 01:00 1.00 I CLEAN I P CLEAN Reverse circulate 2% KCL 9.1 ppg NaCI brine. 5 bpm, 750 psi. Shut down pumping to rotate and reciprocate full stand occasionally. Fiitering returns. CLEAN Continue 2nd brine circulation: Reverse circulate 2% KCL 9.1 ppg NaCI brine. Had to slow rate to 4 bpm, 510 psi for MI filtration unit to keep up. Shut down pumping to rotate and reciprocate full stand occasionally. Filtering retums. CLEAN Shut down to let MI catch up. Return pit getting too fuil. CLEAN Continue 2nd brine reverse circulation. 4 bpm, 515 psi. NTU ~ 39. End of 2nd circulation. CLEAN Change MI filtration unit filters. CLEAN 3rd Brine reverse circulation: 4 bpm, 510 psi. Shut down pumping to rotate and reciprocate fuil stand occasionaily. Filtering returns. CLEAN Shut down to let MI catch up. CLEAN Continue 3rd Brine reverse circulation: 4 bpm, 510 psi. Shut down pumping to rotate and reciprocate fuil stand occasiona~ly. Filtering returns. NTU ~ 27. End of 3rd circulation. CLEAN Shut down to let MI catch up. CLEAN Continue reverse circulating, checking NTU's every drillpipe bottoms up. 4 bpm, 520 psi. Filtering returns. Final NTU's ~ 24. CLEAN Rig down circulating lines. Laydown pup, pick up single joint. Blowdown topdrive. PU - 125k, SO - 80k. MW - 9.1 pP9• CLEAN POH from 6,467' to 306'. CLEAN Laydown 4 3/4" drill collars, scrapers and bit. CLEAN Pull wear bushing, install test plug. CLEAN Open doors on BOP stack and inspect. Bonnets had some residual cement in lower doors. Clean out BOP stack. CLEAN Test door seals to 250 psi low, 3,500 psi high. CLEAN Rig down BOPE test equipment, rig up to test casing. CLEAN Test casing to 3,000 psi - 30 min - Good test. OTHCMP Install wear bushing, rig up SLB E-line. OTHCMP Make up Baker FA packer on CUGR WL tools. Run in hole and log up from 6,445'. Correlate log to MWD recorded logs. Set packer ~ 6,422' W LM. POH. OTHCMP Rig down SLB E-line. 1.001 CLEAN I P 01:00 - 01:30 0.50 CLEAN P 01:30 - 02:30 1.00 CLEAN P 02:30 - 03:00 0.50 CLEAN P 03:00 - 04:30 1.50 CLEAN P 04:30 - 05:00 0.50 CLEAN P 05:00 - 06:00 1.00 CLEAN P 06:00 - 06:30 0.50 CLEAN P 06:30 - 08:30 2.00 CLEAN P 08:30 - 09:00 I 0.50 I CLEAN I P 09:00 - 11:00 2.00 CLEAN P 11:00 - 12:00 1.00 CLEAN P 12:00 - 12:30 0.50 CLEAN P 12:30 - 14:00 1.50 BOPSU P 14:00 - 14:30 0.50 BOPSU P 14:30 - 15:00 0.50 CLEAN P 15:00 - 15:30 0.50 CLEAN P 15:30 - 16:00 0.50 DHEQP P 16:00 - 19:00 3.00 DHEQP P 19:00 - 19:30 I 0.501 DHEQP I P Printed: 7/10/2007 12:02:31 PM , ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: WORKOVER Start: 6/13/2007 End: 6/23/2007 Contractor Name: NABORS AL,ASKA DRILLING I Rig Release: 6/23/2007 Rig Name: NABORS 9ES Rig Number: 6/17/2007 19:30 - 20:30 1.00 PERFO~ P 20:30 - 21:30 1.00 PERFO P 21:30 - 00:00 2.50 PERFO P 6/18/2007 I 00:00 - 01:00 I 1.001 PERFOBI P 01:00 - 01:30 I 0.501 PERFOBI P 01:30 - 01:45 I 0.251 PERFOBI P 01:45 - 02:00 0.25 PERFO~ P 02:00 - 02:30 0.50 PERFO N WAIT 02:30 - 04:30 2.00 PERFO P 04:30 - 05:00 I 0.501 PERFOBI P 05:~0 - 07:30 2.50 PERFO P 07:30 - 08:30 1.00 PERFO P 08:30 - 09:00 0.50 PERFO P 09:00 - 10:30 1.50 CASE P 10:30 - 11:00 0.50 CASE P 11:00 - 13:30 2.50 CASE P 13:30 - 19:00 I 5.501 CASE I P 19:00 - 19:30 0.50 CASE P 19:30 - 21:00 1.50 CASE P 21:00 - 23:30 ~ 2.50I CASE I P 23:30 - 00:00 I 0.501 CASE I P 6/19/2007 00:00 - 01:30 1.50 CASE P 01:30 - 03:00 1.50 CASE P OTHCMP Service topdrive. OTHCMP Pick up 4.72" PF 4621, 21 SPF DPC perf gun assembly. OTHCMP Run in hole with DPC perf assembly on HWDP and drilipipe from 232' to 4,706. OTHCMP Continue running in hole with DPC perf assembly from 4,706' to 6,422' WLM. PU - 125k, SO- 75k. Tag up on packer with latch head assembly. Set 10k down on packer. Pick up and release from packer with 8k over string weight. Pick up 5 ft to set guns on depth. OTHCMP Initiate gun firing sequence. Good indication of guns firing. Lost 7 bbls initially. Observe well - falling siowly. Perf intervals: 6,210 - 6,300' / 90 ft/ 1,890 shots , 6,320 - 6,350' / 30 ft/ 630 shots 6,398' - 6,415' / 17 ft/ 357 shots Total Loaded - 137 ft/ 2877 shots OTHCMP POH 2.6 stands to get guns above top perf. 60k overpull to pull free. 30k drag for 1 st stand. OTHCMP Circulate the long way ~ 4 bpm, 205 psi. OTHCMP Shut down. MI filter unit was not ready. OTHCMP Continue circulating bottoms up ~ 4 bpm, 205 psi. ~ost 94 bbls while circulating. OTHCMP Monitor well. Blowdown topdrive. Static loss rate ~ 1.3 bpm. OTHCMP POH with DPC perf assembly from 6,170' to 334'. OTHCMP PJSM. Laydown perf guns. Atl guns fired. OTHCMP Clear and clean rig floor. RUNPRD Make up dummy Snap Latch Seai assembly and run in hole on HWDP-DP to 2,175'. RUNPRD Ciear ice out of derrick. 'Lost 315 bbls from 01:30 to noon. RUNPRD Continue running in hole from 2,175' to 6,422' WLM, 6,419' SLM. Latched into FA-1 packer. Unlatch and pick up 1 foot. RUNPRD Reverse circulate, cutting back brine weight from 9.1 ppg to 8.7 ppg due to losses. 3 bpm, 215 psi NTU cut from 110 to 50. Monitor well - Static loss rate ~ 6 bph. RUNPRD POH from 6,418' to 5,903'. RUNPRD Cut and slip drilling line 75'. Clean and inspect drawworks brakes. RUNPRD Continue POH from 5,903' to surface. Laydown Snap Latch assembly. RUNPRD Clear and clean rig floor. *Lost 405 bbls from noon to midnight *720 bbls total for the day & well. RUNPRD Rig up to run Gravei Pack Screen assembly. RUNPRD Pick up and make up Gravei Pack Screen assembly. 80-40 Seais X Muleshoe 80-40 "S-22" Snap Latch Seal Assembly w/ 4 1/2" 12.6# LTC Printed: 7/10/2007 12:02:31 PM ~ ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: WORKOVER Start: 6/13/2007 End: 6/23/2007 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 6/23/2007 Rig Name: NABORS 9ES Rig Number: 6/19/2007 I 01:30 - 03:00 I 1.50 I CASE I P 03:00 - 03:30 0.50 CASE P 03:30 - 05:00 1.50 CASE P 05:00 - 06:00 1.00 CASE P 06:00 - 10:30 4.50 CASE P 10:30 - 11:00 I 0.501 CASE I P 11:00 - 12:00 12:00 - 15:00 1.00 CASE P 3.00 CASE P RUNPRD Box Crossover Sub 4" 9.5# IBT Box X 4 1/2" LTC Pin 6 Jts 4" Excluder 2000 Medium 9.5# IBT B x P Crossover Sub 4 1/2" 18# SLHT box 4" 9.5# IBT Pin 2 Jts 4 1/2" Blank Pipe w/ 11.6# SLHT B x P 4 1/2" Shear Out Safety Jt. "GPR-24" w/ 11.6# SLHT B x P (63K) Crossover Sub 5" 18# SLHT Box X 4 1/2" 11.6# SLHT Pin 80-40 Lower Extension 80-40 Seal Bore 80-40 Sliding Sleeve 80-40 Upper Extension RUNPRD Rig up to run 2 7/8" Hydril 511 inner string. RUNPRD Run 10 joints of inner string and space out to 2 ft above Snap Latch. Make up Baker SC-1, 706-40 packer. RUNPRD Run in hole with Gravel Pack Screen assembly on HW DP from 369' to 1,104'. RUNPRD Run in hole with Gravel Pack Screen assembly on DP from 1,104' to 6,394'. PU - 172k, SO - 70k. C/O to long bales, rig up circulating assembly to workstring. RUNPRD Siack off and tag sump packer on depth ~ 6,419' md. Set down 10k to engage latch. Pick up 8k over to release. Set down and slack off 5k on depth. RUNPRD Make up circulating manifold. RUNPRD PJSM. P/U string to neutral position, R/U to circulate clean brine, PT Lines to 3500 psi. Drop 1-3/4" Baker-Lite ball and follow muiti-step Baker instructions for setting the Baker SC-1 packer. Pressure to 1800, 2500, & 3100 psi for 5 minutes each bleeding down to 0 psi between each. Good indication of packer set - Pull test to 160k, SO to 75k. Pressure annulus to 3000 psi to release from packer - OK. Pick up 8'. Lost 94 bbls to brine to formation prior to stining into seal assy. 15:00 - 16:00 1.00 CASE P RUNPRD Reverse circulate out the Baker-Lite packer setting ball ~ 3 bpm, 160 psi. 16:00 - 18:00 2.00 CHEM P RUNPRD Fill and pressure test ali lines to 2500 psi. Pump 10 bbls Duo-Vis pill ~ 2 BPM, 120 psi, followed by 65 bbls Safe-Solv ~ 1 BPM, 60 psi. Once solvent pill at base of workstring, reverse out pill ~ 2bpm, 130 psi dumping ali fluid returning to seperate tank. 18:00 - 20:00 2.00 CHEM P RUNPRD Flush all remaining lines & PT to 3000 psi. Pump 12 bbls 15% HCI acid foliowed by 52 bbls 8.7ppg brine, spot above X-over port, reverse out to disposal tank until retums are clean and pH is neutrai. 20:00 - 21:00 1.00 CHEM P RUNPRD Spot and RU Frac Unit. PJSM on step rate testing and gravel pack preparation pumping. 21:00 - 22:00 1.00 CHEM P RUNPRD Circulating Step Rate test performed by Dowell ~ 2, 4, 6, 8, 10, 12, & 2 bpm. 22:00 - 23:00 1.00 CHEM P RUNPRD Reverse Circulating Step Rate Test performed by Doweil ~ 2, 4, 6, 8, 10, 12, & 2 bpm. Printed: 7/102007 12:02:31 PM . ~ Legal Well Name: Common Well Name Event Name: Contractor Name: Rig Name: S-401 S-401 WORKOVER NABORS ALASKA DRILLING I NABORS 9ES Spud Date: 9/16/2006 Start: 6/13/2007 End: 6/23/2007 Rig Release: 6/23/2007 Rig Number: 6/19/2007 23:00 - 23:30 23:30 - 00:00 6/20/2007 00:00 - 01:00 01:00 - 01:30 01:30 - 02:00 02:00 - 03:00 1.00 CHEM P 03:00 - 05:00 2.00 CHEM P 05:00 - 06:00 1.00 CHEM P 06:00 - 09:00 3.00 CHEM P 09:00 - 09:30 0.50 CHEM P 09:30 - 10:30 1.00 CHEM P 10:30 - 11:00 0.50 CHEM P 11:00 - 11:30 0.50 CHEM P RUNPRD Line up to SLB pumps. Bullhead to formation 55 bbls 15% HCI @ 5 BPM, 560 psi. Chase w/ 9.1 ppg brine at 10 bpm, 680 psi to spot acid across perforations. RUNPRD PJSM w/ morning tour on gravel packing operations while acid spotted across pertorations. RUNPRD Flush out acid pill through perforations and into formation. 12 bpm, 2100 psi. RUNPRD Dowell pumps pertorm post-acid step-rate test ~ 2, 4, 6, 8, 10, 12 bpm. No significant change in injectiviry from before acid fiush. RUNPRD Pump gravel pack job w/ Dowell pumps in the foliowing order: 30 bbl 9.1 ppg brine ~ 11.5 bpm, 1420 psi, 50 bbl 9.1 ppg brine w/ 0.5 ppg 20/40 C-Lite ~ 12.0 bpm, 1425 psi, 50 bbl 9.1 ppg brine w/ 1.0 ppg 20/40 C-Lite ~ 12.0 bpm, 1570 psi, 76.6 bbl 9.1 ppg brine w/ 1.5 ppg 20/40 C-Lite ~ 12.0 bpm, ~2100 psi, Taking returns at 2 bpm during duration of pumping. Screened out to 3000 psi and kicked out pumps w/ 76.6 bbls of 1.5ppg proppant away. RUNPRD Shut down dowell pumps, line up to rig for reverse circulation. Hold 500 psi on annulus and pick up to reverse circulation position. PU smooth. Reverse circulate out -3 workstring volumes at 6 bpm until brine retums as clean as going in. Shut down rig pumps. RUNPRD RD Doweil Schlumberger and all gravel packing lines and hardware from rig floor. Prepare to LDDP. RUNPRD POOH 4 stands to pull workstring above packer. POH in singles to 5,183' md. Losing brine to formation at 30 bph RUNPRD POH laying down 4" drill pipe from 5,183' to -300'. RUNPRD Rig up floor to handle 2-7/8" work string. RUNPRD Break out and lay down Baker packer running tools and 10 joints of 2-7/8" hydril pipe. RUNPRD Rig down and clear rig floor of all vendor tools. RUNPRD RIH w/ 10 stands of 4" DP from derrick. 0.50 CHEM P 0.50 CHEM P 1.00 CHEM P 0.50 CHEM P 0.50 CHEM P ' losses at 12:00 were 15 bph. Losses from midnight to noon totaled 581 bbls. 11:30 - 13:00 1.50 CHEM P RUNPRD POH laying down 4" drill pipe from -900'. 13:00 - 14:30 1.50 BOPSU P RUNCMP Pull wear bushing. Instail BOPE test plug.Change out lower pipe rams from 2 7/8" x 5" rams to 7" pipe rams. Test door seals to 250 low, 3500 psi high. 14:30 - 15:00 0.50 BOPSU P RUNCMP Test BOPE door seals to 250 low, 3500 psi high - OK. 15:00 - 17:00 2.00 RUNCO RUNCMP Bring necessary equipment to rig floor and RU for running of 5.5" ESP completion. 17:00 - 18:30 1.50 RUNCO WAIT RUNCMP Wait on Baker Centrilift spooling unit from Milne to arrive on location. 18:30 - 22:00 3.50 RUNCO RUNCMP Spot into position and RU spooling unit. Hang sheaves for I-Wire and ESP cable. 22:00 - 00:00 2.00 RUNCO RUNCMP PJSM w/ rig crew, Baker, & Halliburton service personel on ESP MU & completion running. MU ESP modules 1& 2 of 5 Printed: 7/10/2007 12:02:31 PM ~ • ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9/16/2006 Event Name: WORKOVER Start: 6h 3/2007 End: 6/23/2007 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 6/23/2007 Rig Name: NABORS 9ES Rig Number: 6/20/2007 22:00 - 00:00 2.00 RUNCO RUNCMP total. Fill each module w/ mineral oil and apply vacuum to eliminate air in modules. 6/21/2007 00:00 - 04:45 4.75 RUNCO RUNCMP MU ESP modules 3, 4, & 5. Fill each module w/ mineral oil and apply vacuum to eliminate air in modules. 04:45 - 05:00 0.25 RUNCO RUNCMP Plug in and clamp ESP cable to motor. Install HES pressure gauge and connect to I-Wire. 05:00 - 05:30 0.50 RUNCO RUNCMP RIH with ESP assembly with cable and I-wire on 5-1/2" 17# L-80 IBT tubing to -150'. 05:30 - 06:00 0.50 RUNCO DFAL RUNCMP Electrical Insulation check failed on ESP cable at surface end. Insulation reading from phase to ground should read 2.0 or more Giga-ohms, but was fluctuating between 1.6 G-Ohms and 0.010 G-Ohms - Insulation leak. 06:00 - 07:30 1.50 RUNCO DFAL RUNCMP Puli ESP cable connection up to rig floor. Disconnect cable. Clean out connection. Re-test cable - OK. Re-test motor insulation seperately from cable - OK. Re-attach cable. Insulation tests good again. Suspected moisture in line end may have been the problem. 07:30 - 10:00 2.50 RUNCO DFAL RUNCMP RIH with ESP assembly with cable and I-wire on 5-1/2" 17# L-80 IBT-M tubing to 927'. Installing Cable Clamps every joint as per Baker Rep. Cable insulation check at 927' md showed 32k-ohms. Decision made to POH. 10:00 - 10:30 0.50 RUNCO DFAL RUNCMP Prepare rig floor to lay down 5.5" x 17# tubing. 10:30 - 14:00 3.50 RUNCO DFAL RUNCMP POOH laying down clamps and 5.5" tubing from 927' to centrilift assembly ~ 95' md. "Losses C~ 3 bph and slowing. Lost 39 bbls brine to weli from 00:00 - 12:00 14:00 - 18:30 4.50 RUNCO DFAL RUNCMP Cut and re-splice cable at connection point between Round Power cable and fiat Motor Lead Extension. 18:30 - 19:30 1.00 RUNCO DFAL RUNCMP Lay down ESP modules. Save pumps for re-run & pull motor modules to be replaced w/ new motors. 19:30 - 00:00 4.50 RUNCO DFAL RUNCMP PU new motors, service and inspect - OK. PU Pumps. Connect ESP Cable & Test Insulation - OK. 'Losses ~ 2 bph. Lost 29 bbls to well from 12:00 - 23:59 6/22/2007 00:00 - 01:00 1.00 RUNCO DFAL RUNCMP Continue MU ESP Modules. Check Insulation - OK. 01:00 - 03:00 2.00 RUNCO DFAL RUNCMP Connect I-Wire to HES Symphony gauge and RIH with ESP assembly with cable and I-wire on 5-1/2" 17# L-80 IBT-M tubing to 927'. Utilized BOL-2000 thread compound and torque to 4,800 ft-Ibs. Apply cabie ciamp every joint. All cable insulation checks OK. 03:00 - 04:00 1.00 RUNCO RUNCMP Continue to RIH with ESP assembly with cable and I-wire on , 5-1/2" 17# L-80 IBT-M tubing to 1,565'. Utilized BOL-2000 thread compound and torque to 4,800 ft-Ibs. Apply cable clamp to collars as directed. Total of 23 5.5" duai channel cannon clamps used. Test cable every 420'. All cable insulation checks OK. 04:00 - 04:30 0.50 RUNCO RUNCMP Change elevators and tongs to handle 7" Casing. 04:30 - 10:00 5.50 RUNCO RUNCMP RIH with ESP assembly with cable and I-wire on 7" 26# L-80 BTC-M tubing to 3,795'. Utilized BOL-2000 thread compound and torque to 8,600'. Apply cable clamp to collars as directed. Total of 29 - 7" dual channel cannon clamps used. All cable insulation checks OK. 10:00 - 12:30 2.50 RUNCO RUNCMP MU tubing hanger. Cut ESP electric cable and LD double sheave. Spool up excess cable. Cut I-wire and MU to the Printed: 7/10/2007 12:02:31 PM ~ . ~ Legal Well Name: S-401 Common Well Name: S-401 Spud Date: 9h6/2006 Event Name: WORKOVER Start: 6/13/2007 End: 6/23/2007 Contractor Name: NABORS ALASKA DRILLING I Rig Release: 6/23/2007 Rig Name: NABORS 9ES Rig Number: 6/22/2007 10:00 - 12:30 2.50 RUNCO RUNCMP tubing hanger. MU landing joint to the hanger. MU penetrator to the hanger. Splice the electric line to the penetrator. PU - t00K, SO - 75K. Verify continuity. Install lower connector kit I to the power cable ~ "`losses from 00:00 - 12:00 were 12 bbis @ 1 bph. 12:30 - 13:30 1.00 RUNCO RUNCMP Land tubing hanger. RILDS to 450 ft-Ibs. Tighten gland nuts to 350 ft-Ibs. Test hanger void to 5000 psi for 10 minutes - OK. Clear floor of all service company tools. , 13:30 - 14:30 1.00 WHSUR P RUNCMP Lay down landing joint. Instail TWC valve. ~ 14:30 - 16:00 1.50 BOPSU P RUNCMP ND BOPE. Stand back on pedastal. 16:00 - 20:00 4.00 WHSUR P RUNCMP NU tree and confirm ESP continuity. Test hanger, ESP penetrator to 5,000 psi - good test. 20:00 - 21:0~ 1.00 WHSUR P RUNCMP Fill tree and attempt test to 5000 psi. Pressure bieeding off. No fluid leaking from visible flanges. , 21:00 - 22:00 1.00 WHSUR P RUNCMP Lubricate out TWC, Run 2nd TWC & attempt to test tree again. ~ Pressure still bleeding off. 22:00 - 00:00 2.00 WHSUR P RUNCMP Test surface equipment to 5000 psi - OK. Re-test void to 5000 psi - OK. Cycle ail vaives, as per FMC attempt to fill all voids in large 7" valves. Pressure tree to 1000 psi and cycle valves and bleed. 6/23/2007 00:00 - 02:00 2.00 WHSUR P RUNCMP Continue to attempt tests on tree. Bleed off gradualiy healing up. Finally got passing test to 3000 psi for 10 minutes. 02:00 - 06:00 4.00 WHSUR P RUNCMP Pu-I TWC. RU Little Red and bullhead 80 bbis diesel down tubing ~ 2 bpm 850 psi displacing 8.7 brine to formation. Rig Little Red from tubing side to annulus side. Pump 230 bbls i diesel down annulus ~ 2 bpm 900 psi displacing 8.7 brine to formation. 06:00 - 07:00 1.00 WHSUR P RUNCMP RU lines and allow diesel to U-Tube. 07:00 - 08:00 1.00 WHSUR P RUNCMP Rig down Littie Red and U-tube lines. Lubricate in TWC. 08:00 - 09:00 1.00 WHSUR P RUNCMP RU and test tree to 5000 psi - Good test. RD Test equipment. I 09:00 - 10:00 1.00 WHSUR P RUNCMP Lubricate out TWC, Lubricate in BPV. Rig down Drili Site ~ Maintenace. 10:00 - 12:00 2.00 W HSUR P RUNCMP Secure cellar and tree. Release rig to standby for S-125 at 12:00 6/23/2007 Printed: 7/10/2007 12:02:31 PM ! bp s-4o ~ s u Report Date: 22-OCt-(~ CIieM: BP ExpI0f860f1 AIi1SkE Field: PNdhoe Bay Unit - WOA s~ruaure ~ sia: S-PAD I S-401 WNI: $-401 Borehole: S-0Ot uwuaP~t: 50029233130( Survey Name 1 Date: 5-401 I Octobef 22, 200E ToR 1 AHD 1 DDI 1 ERD ratio: 171.006° / 4497.28 ft/ 6.097 I 1.11 ~ Grid Coordinate System: NAD27 Alaska State Planes, Zone 04, US Fee Location LatlLong: N 70.35502283, W t49.0341760! location Grid NIE YIX: N 5980370.200 ftUS, E 618930.260 ftll: Grid Convergence Angle: +0.90961676° / Schlumberger Vertical Section Azimuth: 308.120° Vertical Section Origin: N 0.000 ft, E 0.000 fl ND Reference Datum: ROtaly TebI2 ND Reference Elevation: 64.58 ft i'ei2tive t0 MSL Sea Bed 1 Ground Level Elevation: 36.10 ft fel~6ve to MSL Magnetic Declination: 24.041 ° Tota~ Field Strength: 57638.861 nT Magnetic Dip: 80.925° Declination Date: OCtobef 21, 200E Magnetic Declination Model: BGGM 2006 North Reference: TNe NOrth • Total Corr Mag North -> True North: +24.041 ° Local Coordinates Referenced To: Wed Head CommeMS Measured ~nclination Azimuth Sub•Sea ND ND Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longkude Depth Section Departure ft d d k ft ft ft ft k k de 100tt kUS kUS Klt u.uu v.VU u.w -o4..~ts v.uu V.uu u.w V.uu V.vu u.w u.w ~yaua~u.cV ~-~oy.7u.co rv~u.a~auccoo vv ~qy.V,y4-~~ovy GYD GC SS 72.00 0.23 46.16 7.42 72.00 -0.02 0.14 0.14 0.10 0.10 0.32 5980370.30 618930.36 N 70.35502310 W 149.03417525 167.00 0.10 311.58 102.42 167.00 0.04 0.37 0.34 0.29 0.18 0.27 5980370.49 618930.44 N 70.35502361 W 149.03417463 256.00 0.40 258.00 191.42 256.00 0.31 0.74 0.33 0.27 -0.18 0.39 5980370.47 618930.07 N 70.35502357 W 149.03417757 347.00 0.85 236.89 282.41 346.99 0.73 1.72 1.07 -0.16 -1.06 0.55 5980370.02 618829.20 N 70.35502239 W 149.03418469 437.00 2.19 254.40 372.38 436.96 1.97 4.09 3.42 -0.99 -3.27 1.56 5980369.16 618927.00 N 70.35502013 W 149.03420268 525.00 7.03 286.78 460.08 524.66 7.98 11.02 10.05 0.12 -10.05 6.04 5980370.16 618820.21 N 70.35502314 W 149.03425773 614.00 8.66 284.62 548.24 6i2.82 19.20 23.17 22.0'1 3.38 -21.T5 1.86 5980373.23 618908.46 N 70.35503206 W 149.03435272 708.00 10.92 276.69 640.87 705.45 33.29 39.13 37.96 6.20 -37.45 2.79 5980375.81 618892.72 N 70.35503977 W 149.03448015 Last GYD GC SS 804.00 13.28 27929 734.73 799.31 50.71 59.24 58.07 9.04 -57.36 2.52 5980378.33 618872.77 N 70.35504753 W 149.03464186 First MWD+IFR+AAS 833.17 12.71 281.36 763.16 827.74 56.51 65.80 64.63 10.22 -63.81 2.52 5980379.40 618866.30 N 70.35505073 W 149.034694 927.28 14.63 285.93 854.60 919.18 76.i6 88.03 86.79 15.52 -85.40 2.34 5980384.36 618844.64 ~ N 70.35506522 W 149.03486 979.55 15.26 290.07 ~5.10 969.68 89.41 101.51 100.16 19.69 -98.20 2.37 5980388.33 618831.76 N 70.35507662 W 149.034973 1021.04 17.07 291.32 944.95 1009.53 100.44 113.06 111.57 23.78 -109.01 4.44 5980392.24 618820.80 N 70.35508778 W 149.03506121 1115.52 21.95 289.76 1033.98 1098.56 130.49 144.60 142.86 34.80 -138.56 5.19 5980402.79 618791.18 N 70.35511788 W 149.03530119 1208.92 26.36 287.14 1119.18 1183.76 166.44 182.80 180.98 46.82 -174.82 4.86 5980414.23 618754.73 N 70.35515072 W 149.03559563 1303.07 28.56 286.36 1202.72 1267.30 206.86 22622 224.38 59.32 -216.40 2.37 5980426.07 618712.97 N 70.35518486 W 149.03593320 1364.07 28.65 288.73 1256.28 1320.86 234.20 255.42 253.56 68.12 -244.24 1.87 5980434.43 618684.99 N 70.35520891 W 149.03615926 14~.06 28.35 288.68 1287.91 1352.49 250.39 272.59 270.71 73.63 -260.50 0.84 5980439.68 618668.64 N 70.35522395 W 149.03629134 1435.86 29.01 288.21 1319.31 1383.89 266.57 289.77 287.87 79.06 -276.80 1.95 5980444.85 618652.26 N 70.35523880 W 149.03642369 1494.92 32.37 288.81 1370.09 1434.67 294.96 319.91 317.98 88.64 -305.38 5.71 5980453.97 618623.54 N 70.35526496 W 149.03665574 1588.78 34.77 292.20 1448.30 1512.88 344.42 3T1.80 369.73 106.86 -353.95 3.24 5980471.41 618574.69 N 70.35531472 W 149.03705016 1683.32 39.28 293.93 1523.76 1588.34 399.39 428.71 426.34 129.19 -406.30 4.90 5980492.92 618522.00 N 70.35537574 W 149.03747519 1777.09 43.59 294.66 1594.05 1658.63 459.64 490.75 488.01 154.73 -462.83 4.63 5980517.55 618465.07 N 70.35544550 W 149.03793428 SurveyEditor Ver SP 2.1 Bld( doc40x_100 ) S-401\S-401\S-401\S-401 Generated 11/15/2006 12:15 PM Page 1 of 3 4 Comments Measured ~nclination Azimuth Sub-Sea TVD TVD Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longitude Depth Section Departure R d d ft k k ft ft ft ft d H00 k ftUS ftUS itsiu.as 4o.va z~.oa ioou.su iiz4.aa ots.a~t aao.ot aos.wy iat.io -~«.~ ~.~~ a~ouawv.o~ oio•ruo.uc iv rv.~aaaccw vr ~4a.uao~.iwv 1965.58 51.84 297.07 1722.69 1787.27 594.01 62828 624.66 214.63 -586.63 6.16 5980575.47 618340.35 N 70.35560911 W 149.03893954 2060.73 57.66 298.36 1777.58 1842.16 670.40 705.95 701.71 250.78 -655.37 6.22 5980610.52 618271.05 N 70.35570785 W 149.03949776 2155.65 62.94 299.89 1824.60 1889.18 751.81 788.37 783.37 290.92 -727.35 5.74 5980649.51 618198.44 N 70.35581749 W 149.04008229 2250.95 64.11 299.23 1867.08 1931.66 836.16 873.68 867.97 333.00 -801.56 1.38 5980690.40 618123.59 N 70.35593243 W 148.04068485 2345.06 67.95 300.85 1905.31 1969.89 921.29 959.65 953.28 376.05 -875.97 4.37 5980732.27 618048.50 N 70.35605~3 W 149.04128917 2439.86 71.62 301.70 1938.06 2002.64 1009.60 1048.60 1041.42 422.23 -951.99 3.96 5980777.23 617971.77 N 70.35617616 W 149.04190648 2533.10 72.25 302.66 1966.97 2031.55 7097.76 1137.24 1129.22 469.44 -1027.01 1.19 5980823.24 &17896.0'! N 70.35630511 W 149.04251575 2627.77 72.76 306.44 7995.44 2060.02 1187.86 1227.53 121822 520.64 -1101.36 3.85 5980873.25 617820.87 N 70.35644495 W 149.04311953 2724.09 72.46 309.35 202424 2088.82 1279.76 1319.44 1308.07 577.09 -1173.89 2.~ 5980928.54 617747.46 N 70.35659813 W 149.04370856 2818.00 72.04 311.76 2052.87 2117.45 1369.12 1408.88 1394.88 635.24 -1241.84 2.48 5980985.59 617678.60 N 70.35675795 W 149.0442604~ 2914.58 72.69 315.23 2082.14 2146.72 1460.73 1500.92 1483.38 698.58 -1308.59 3.49 5981047.86 617610.86 N 70.35693097 W 149.044802 3009.33 74.92 317.76 2108.57 2173.15 1550.74 1591.90 1569.97 764.57 -137121 3.48 5981112.84 617547.20 N 70.35711123 W 149.04531120 3103.32 74.59 318.49 2133.28 2197.86 1640.04 1682.59 1655.98 832.09 -1431.74 0.83 5981179.39 617485.61 N 70.35729566 W 149.04580285 3198.15 73.98 319.24 2158.97 2223.55 1729.72 1773.87 1742.69 900.85 -1491.79 1.00 5981247.17 617424.48 N 70.35748345 W 149.04629062 3290.25 72.50 318.96 2185.52 2250.10 1816.30 1862.06 1826.77 967.50 -1549.53 1.63 5981312.90 617365.70 N 70.35766551 W 149.04675961 3383.68 72.96 318.62 2213.26 2277.84 1903.97 1951.27 1912.35 1034.62 -1608.31 0.60 5981379.07 617305.87 N 70.35784884 W 149.04723705 3476.47 74.14 318.61 2239.54 2304.12 1991.47 2040.26 1998.10 1101.39 -1667.14 1.27 5981444.89 617245.99 N 70.35803121 W 149.04771495 3572.06 74.35 317.01 2265.49 2330.07 2082.15 2132.26 2087.35 1169.55 -1728.93 1.63 5981512.06 617183.13 N 70.35821738 W 149.04821683 3668.32 72.94 316.22 2292.60 2357.18 2173.50 2224.62 2177.60 1236.67 -1792.37 1.66 5981578.16 617118.64 N 70.35840072 W 149.04873217 3762.00 72.47 316.61 2320.45 2385.03 2262.01 2314.07 2265.23 1301.46 -1854.03 0.64 5981641.96 617055.96 N 70.35857767 W 149.04923309 3859.48 70.42 316.32 2351.47 2416.05 2353.44 2406.48 2355.88 1368.46 -1917.68 2.12 5981707.92 616991.26 N 70.35876065 W 149.04975014 3954.49 68.06 3f4.81 2385.14 2449.72 2441.52 2495.31 2443.40 1431.89 -1979.87 2.89 5981770.36 616928.08 N 70.35893391 W 149.05025530 4048.37 68.10 312.63 2420.19 2484.77 2528.19 2582.40 2529.70 1492.08 -2042.81 2.15 5981829.54 616864.20 N 70.35909829 W 149.05076659 4143.17 69.89 312.42 2454.17 2518.75 2616.43 2670.90 2617.66 1551.90 -2108.03 1.90 5981888.30 616798.04 N 70.35926165 W 149.05129641 4234.26 69.08 311.48 2486.10 2550.68 2701.55 2756.21 2702.58 1608.93 -2171.48 1.31 5981944.31 616733.71 N 70.35941740 W 149.05181183 4355.78 68.53 311.84 2530.03 2594.61 2814.63 2869.51 2815.45 1684.24 -2256.12 0.53 5982018.27 616647.88 N 70.35962307 W 149.05249947 Tie-In Swvey 4355.~8 68.53 311.84 2530.03 2594.61 2814.63 2869.51 2875.45 1684.24 -2256.12 3.41 5982018.27 6166d7.88 N 70.35962307 W 149.05249947 KOP 4400.00 65.10 313.03 2547.44 2612.02 2855.16 2910.15 2855.89 1711.66 -2286.12 8.14 5982045.20 616617.45 N 70.35969796 W 149.05274 4437.72 62.51 313.27 2564.09 2628.67 2888.87 2944.00 2889.53 1734.80 -2310.81 6.89 5982067.95 616592.40 ~ N 70.35976116 W 149.05294 4530.17 60.50 312.50 2608.19 2672.77 2969.84 3025.24 2970.34 1790.09 -2370.34 2.29 5982122.29 616532.01 N 70.35991217 W 149.053427 4627.36 62.60 311.00 2654.49 27'19.07 3055.11 3110.69 3055.51 1846.98 -2434.09 2.55 5982178.15 616467.36 N 70.36006753 W 149.05394532 4720.58 63.10 311.15 2697.03 2761.61 3137.95 3193.64 3138.27 1901.48 -2496.62 0.56 5982231.65 616403.98 N 70,36021636 W 149.05445332 4814.20 62.51 309.43 2739.82 2804.40 3221.15 3276.91 3221.43 1955.33 -2560.13 1.75 5982284.48 616339.63 N 70.36036341 W 149.05496931 4910.26 62.18 308.84 2784.40 2848.98 3306.23 3361.99 3306.47 2009.03 -2626.13 0.64 5982337.12 616272.79 N 70.36051006 W 149.0555054$ 5~6.51 58.31 308.90 2832.16 2896.74 3389.76 3445.54 3389.99 2061.46 -2691.18 4.02 5982388.50 616206.93 N 70.36065322 W 149.05603393 5100.72 56.04 309.45 2883.23 2947.81 3468.91 3524.70 3469.12 2111.46 -2752.55 2.46 5982437.52 616144.78 N 70.36078976 W 149.05653254 5196.42 52.25 309.69 2939.27 3003.85 3546.44 3602.25 3546.62 2160.86 -2812.33 3.97 5982485.96 616084.22 N 70.36092465 W 149.05701825 5289.75 49.08 308.83 2998.42 3063.00 3618.60 3674.43 3618.76 2206.55 -2868.21 3.47 5982530.75 646027.63 N 70.36104940 W 1a9.05747223 5385.18 47.42 308.93 3061.97 3126.55 3689.79 3745.62 3689.94 225723 -2923.63 1.74 5982574.55 615971.51 N 70.36t17143 W 149.05792252 5478.83 45.26 309.47 3126.62 319120 3757.52 3813.37 3757.66 2294.05 -2976.13 2.34 5982616.52 615918.34 N 70.36128833 W 149.05834910 SurveyEditor Ver SP 2.1 Bld( doc40x_100 ) S-401\S-401\S-401\S-401 Generated 11/15/2006 12:15 PM Page 2 of 3 Comments Measured ~nclination Azimuth Sub-Sea ND rvD Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longitude Depth Section DepaRure it d de ft k k k tt R k de 100 ft itUS ftUS 5572.51 42.62 310.87 3194.07 3258.65 3822.48 3878.36 3822.59 2335.96 -3025.81 3.00 5982657.63 5668.66 38.91 315.04 3266.89 3331.47 3885.00 3941.12 3885.08 2378.65 -3071.79 4.78 5982699.58 5760.02 38.33 320.18 3338.29 3402.87 3941.20 3998.12 3941.23 2420.72 -3110.22 3.57 5982741.04 5855.96 38.75 327.58 3413.37 3477.95 3998.64 4057.84 3998.64 2468.94 -3145.38 4.82 5982788.89 5950.25 37.54 333.66 3487.55 3552.13 4052.40 4116.05 4052.47 2519.62 -3173.96 4.18 5982838.90 6043.34 38.48 339.45 3560.92 3625.50 4102.75 4173.34 4103.06 2572.17 -3196.72 3.96 5982891.08 6138.90 38.29 340.62 3635.83 3700.41 4153.11 4232.68 4153.92 2627.94 -3216.98 0.79 5982945.52 6232.52 38.02 340.54 3709.45 3774.03 4201.92 4290.51 4203.43 2682.49 -3236.21 029 5983000.75 6328.26 38.35 340.75 3784.70 3849.28 4251.82 4349.70 4254.27 2738.33 -3255.82 0.37 5983056.26 6422.49 38.54 339.89 3858.50 3923.08 4301.40 4408.29 4304.98 2793.49 -3275.56 0.60 5983111.10 Last MWD+IFR+~ 6504.60 38.24 341.03 3922.86 3987.44 4344.48 4459.28 4349.21 2841.54 -3292.61 0.94 5983158.88 TD ( Projected ) 6566.00 38.24 341.03 3971.08 4035.66 4376.38 4497.28 4382.09 2877.48 -3304.97 0.00 5983194.61 Survey Typa: Deflnitive Sunrey NOTES: GYD GC SS -( Gyrodata - gyro afngle shots - Gyrodata gyro orientaUon surveys. Not to be run above 70 degrees inclination. ) ~Wp +{FR + MS -( Fn-field referenced MWD with mult-station analysis and correction applfed in post-processing. Assumes a BHA sag correctlon is applied to enhance inclination accuracy. ) Leaal D escriution: Northing (Y) [ftUS] Easting (X) [ftUS] Surface : 4166 FSL 4503 FEL S35 T12N R12E UM 5980370.20 618930.26 BHL : 1763 FSL 2524 FEL S27 T12N R12E UM 5983194.61 615580.32 Y 615868.01 N 70.36140278 W 149.05875274 615821.36 N 70.36151935 W 149.05912633 61578228 N 70.36163425 W 149.05943859 615746.35 N 70.36176595 W 149.05972440 615716.98 N 70.361 ~435 W 149.05995669 615693.39 N 70.36204789 W 149.06014173 615672.25 N 70.36220022 W 149.06030649 615652.16 N 70.36234922 W 149.0604&288 615631.66 N 70.36250175 W 149.06062241 615611.05 N 70.36265243 W 149.06078288 615593.24 N 70.36278368 W 149.060921~ 615580.32 N 70.36288185 W 149.061022 r~ L J SurveyEditor Ver SP 2.1 Bld( doc40x_100 ) S-401\S-401\S-401\S-401 Generated 11/15/2006 12:15 PM Page 3 of 3 bp S-401 PB 1 Su CIieM: Field: Structure 1 Slot: Well: Borehoie: uwuaa~: Survey Name I Date: Tort I AHD 1 DDI 1 ERD ratio: Grid Coordinate System: Location LatlLong: Location Grid NIE YIX: Grid Convergence Angle: BP Expbra6on Alask~ Prudhoe Bay Unit - WOA S-PAD / S-401 S-401 S-401PB1 50029233137[ S-4011 Sep~mber 18, 200f 152.019° I 4434.13 ft/ 6.041 / 1.11! NAD27 Alaska State Planes, Zone 04, US Fee N 70.35502283, W 149.0341760! N 5980370.200 flUS, E 618930.260 flU: +0.90961676° Report ~ chlumberger Survey 1 DLS Computation Method: Mlflimum CuNatufe / L Vertical Section Azimuth: 308.120° Vertical Section Origin: N 0.000 ft, E 0.000 N TVD Reference Datum: ROt2ry Tebl~ ND Reference Elevation: 64.58 ft relative to MSL Sea Bed 1 Ground LevH Elevatio~: 36.10 ft felaUve to MSL MagneGc Declinatioa: 24.082° 7otal Field Strength: 57636.872 nT Magnetic Dip: 80.922° Declination Date: Septembe! 17, 200E Magnetic Declination Model: BGGM 2006 North Reference: TN2 NWih Total Corr Mag North -> True North: +24.082° i Comments Measured Inclination Azimuth Sub-Sea ND 7yp Vertical Along Hole Closure NS EW DLS Northing Easting Latitude Longitude Depth Section Departure ft d de ft ft k k k k it d 1100 k ftUS ftUS Klt U.W U.W U.W ~64.~iS U.W U.W U.UU U.UU U.W V.W U.W ~~W3/V.N Ol6y3V.L0 IV /V.3~~t-LL63 W l4y.U347lOUy GYD GC SS 72.~ 0.23 46.16 7.42 72.00 -0.02 0.14 0.14 0.10 0.10 0.32 5980370.30 618930.36 N 70.35502310 W 149.03417525 167.00 0.10 311.58 102.42 167.00 0.04 0.37 0.34 0.29 0.18 0.27 5980370.49 618930.44 N 70.35502361 W 149.03417463 256.00 0.40 258.00 191.42 256.00 0.31 0.74 0.33 0.27 -0.18 0.38 5980370.47 618930.07 N 70.35502357 W 149.03417757 347.00 0.85 236.89 282.41 346.99 0.73 7.72 1.07 -0.16 -1.06 0.55 5980370.02 618929.20 N 70.35502239 W 149.03418469 437.00 2.19 254.40 372.38 436.96 1.97 4.09 3.42 -0.99 -3.27 1.56 5980369.16 618927.00 N 70.35502013 W 149.03420268 525.00 7.03 286.78 460.08 524.66 7.98 11.02 10.05 0.12 -10.05 6.04 5980370.16 618920.21 N 70.35502314 W 149.03425773 614.00 8.66 284.62 548.24 612.82 1920 23.17 22.01 3.38 -21.75 1.86 5980373.23 618908.46 N 70.35503206 W 149.03435272 708.00 10.92 276.69 640.87 705.45 33.29 39.13 37.96 620 -37.45 2.79 5980375.81 618892.72 N 70.35503977 W 149.03448015 Last GYD GC SS 804.00 13.28 279.29 734.73 799.31 50.71 59.24 58.07 9.04 -57.36 2.52 5980378.33 618872.77 N 70.35504753 W 149.03464186 First MWD+IFR+p~ 833.17 12.71 281.36 763.16 827.74 56.51 65.80 64.63 10.22 -G3.81 2.52 5980379.40 618866.30 N 70.35505073 W 149.034694 927.28 14.63 285.93 854.60 919.'18 76.76 88.03 86.79 15.52 -85.40 2.34 5980384.36 618844.64 ~ N 70.355Q6522 W 149.03486 979.55 15.26 290.07 905.10 969.68 89.41 101.51 100.16 19.69 -98.20 2.37 5980388.33 618831.76 N 70.35507f~2 W 149.034973 1021.04 17.07 291.32 944.95 1009.53 100.44 113.06 111.57 23.78 -109.01 4.44 5980392.24 618820.90 N 70.35508778 W 149.03506121 1115.52 21.95 289.76 t033.98 1098.56 130.49 144.60 142.86 34.80 -138.56 5.19 5980402.79 618791.18 N 70.35511788 W 149.03530119 1208.92 26.36 287.14 1119.18 1183.76 166.44 182.80 180.98 46.82 -174.82 4.86 5980414.23 618754.73 N 70.35515072 W 149.03559563 1303.07 28.56 286.36 1202.72 1267.30 206.86 226.22 224.38 59.32 -216.40 2.37 5980426.07 618712.97 N 70.35518486 W 149.03593320 1364.07 28.65 288.73 1256.28 1320.86 234.20 255.42 253.56 68.12 -244.24 1.87 5980434.43 618684.99 N 70.35520891 W 149.03615926 1400.06 28.35 288.68 1287.91 1352.49 250.39 272.59 270.71 73.63 -260.50 0.84 5980439.68 618668.64 N 70.35522395 W 145.03629134 f435.86 29.01 288.21 1319.31 9383.B9 266.57 289.77 287.87 79.06 -276.80 1.95 5980444.85 618652.26 N 70.35523880 W 149.03642369 1494.92 32.37 288.81 1370.09 1434.67 294.96 319.91 317.98 88.64 -305.38 5.71 5980453.97 618623.54 N 70.35526496 W 149.03665574 1588.78 34.77 292.20 1448.30 1512.88 344.42 371.80 369.73 106.86 -353.95 3.24 5980471.41 618574.69 N 70.35531472 W 149.03705046 1683.32 39.28 293.93 1523.76 1588.34 399.39 428.71 426.34 129.19 -406.30 4.90 5980492.92 618522.00 N 70.35537574 W 149.03747519 1777.09 43.59 294.66 1594.05 1658.63 459.64 490.75 488.01 154.73 -462.83 4.63 5980517.55 618465.07 N 70.35544550 W 149.03793428 SurveyEditor Ver SP 2.1 Bld( doc40x_100 ) S-401\S-401\S-401\S-401 current Generated 11/15/2006 12:16 PM Page 1 of 3 ~ CommeMs Measured Inclination Azimuth Sub•Sea TVD ND Vertical Along Hale Closure NS EW DLS Northing Easting Latitude Longitude Depth Section Departure k d d k k k k it k ft de 100 ft ftUS ftUS ` ltl/U.53 46.US Z~J~.OC 166U.JU 7/Z4.t5tS OZ3.i54 DOO.OZ OJ3.4`J -16L.lO -~LL.47 L./I ayouJ44.OJ v~awuo.uc ~v iu.oa~oGCw rv iwy.woyio~v 1965.58 51.84 297.07 1722.69 1787.27 594.01 628.28 624.66 214.63 -586.63 6.16 5980575.47 618340.35 N 70.35560911 W 149.03893954 2060.73 57.66 298.36 1777.58 1842.16 670.40 705.95 701.71 250.78 ~55.37 6.22 5980610.52 618271.05 N 70.35570785 W 149.03949776 2155.65 62.94 299.89 1824.60 1889.18 751.81 788.37 783.37 290.92 -727.35 5.74 5980649.51 618198.44 N 70.35581749 W 149.04008229 2250.95 64.11 299.23 1867.08 1931.66 836.16 873.68 867.97 333.~0 -801.56 1.38 5980690.40 618123.59 N 70.35593243 W 149.04068485 2345.06 67.95 300.85 1905.31 1969.89 921.29 959.65 95328 376.05 -875.97 4.37 5980732.27 618048.50 N 70.35605003 W 149.04128917 2439.86 71.62 301.70 1938.06 2002.64 1009.60 1048.60 1041.42 422.23 -951.99 3.96 5980777.23 617971.77 N 70.35617616 W 149.04190648 2533.10 7225 302.66 1966.97 2031.55 1097.76 1137.24 112922 469.44 -1027.01 1.19 5980823.24 617896.01 N 70.35630511 W 149.04251575 2627.77 72.76 306.44 1995.44 2060.02 1187.86 7227.53 1218.22 520.64 -1101.36 3.85 5980873.25 617820.87 N 70.35644495 W 149.04311954 2724.09 72.46 309.35 2024.24 2088.82 1279.76 1319.44 1308.07 577.09 -1173.89 2.90 5980928.54 617747.46 N 70.35659913 W 149.04370856 2818.00 72.04 311.76 2052.87 2117.45 1369.12 1408.88 1394.88 635.24 -1241.84 2.48 5980985.59 617678.60 N 70.35675795 W 149.04426042 ~ 2914.58 72.69 315.23 2082.14 2146.72 1460.73 1500.92 1483.38 698.58 -1308.59 3.49 5981047.86 617610.86 N 70.35693097 W 149.044802 3009.33 74.92 317.76 2108.57 2173.15 1550.74 1591.90 1569.97 764.57 -1371.21 3.48 5981112.84 617547.20 N 70.35711123 W 149.04531120 3103.32 74.59 318.49 2133.28 2197.86 1640.04 1682.59 1655.98 832.09 -1431.74 0.83 5981179.39 617485.61 N 70.35729566 W 149.04580285 3198.15 73.98 319.24 2158.97 2223.55 1729.72 1773.87 1742.69 900.85 -1491.79 1.00 5981247.17 817424.48 N 70.35748345 W 149.04629062 3290.25 72.50 318.96 2185.52 2250.10 1816.30 1862.06 1826.77 967.50 -1549.53 1.63 5981312.90 617365.70 N 70.35766551 W 149.04675961 3383.68 72.96 318.62 2213.26 2277.84 1903.97 1951.27 1912.35 1034.62 -1608.31 0.60 5981379.07 617305.87 N 70.35784884 W 149.04723705 3476.47 74.14 318.61 2239.54 2304.12 1991.47 2040.26 1998.10 1101.39 -1667.14 1.27 5987444.89 617245.99 N 70.35803121 W 149.04771495 3572.06 74.35 317.01 2265.49 2330.07 2082.15 2132.26 2087.35 1169.55 -1728.93 1.63 5981512.06 617183.13 N 70.35821738 W 149.04821683 3668.32 72.94 316.22 2292.60 2357.18 2173.50 2224.62 2177.60 1236.67 -1792.37 1.66 5981578.16 617118.64 N 70.35840072 W 149.04873217 3762.00 72.47 316.61 2320.45 2385.03 2262.01 2314.07 2265.23 1301.46 -1854.03 0.64 5981641.96 617055.96 N 70.35857767 W 149.04923309 3859.48 70.42 316.32 2351.47 2416.05 2353.44 2406.48 2355.88 1368.46 -1917.68 2.12 5981707.92 616991.26 N 70.35876065 W 149.04975014 3954.49 68.06 314.81 2385.14 2449.72 2441.52 2495.31 2443.40 1431.89 -1979.87 2.89 5981770.36 616928.08 N 70.35893391 W 149.05025530 4048.37 68.10 312.63 2420.19 2484.77 2528.19 2582.40 2529.70 1492.08 -2042.81 2.15 5981829.54 616864.20 N 70.35909829 W 149.05076659 4143.17 69.89 312.42 2454.17 2578.75 2616.43 2670.90 2617.66 155i.90 -2108.03 1.90 59B1B88.30 616798.04 N 70.35926165 W 149.05129641 4234.26 69.08 311.48 2486.10 2550.68 2701.55 2756.21 2702.58 1608.93 -2171.48 1.31 5981944.31 616733.70 N 70.35941740 W 149.05181183 4355.78 68.53 311.84 2530.03 2594.61 2814.63 2869.51 2815.45 1684.24 -2256.12 0.53 5982018.27 616647.88 N 70.35962307 W 149.05249948 A451.77 67.70 311.43 2565.81 2630.39 2903.54 2958.58 2904.20 1743.41 -2322.69 0.95 5882076.37 616580.39 N 70.35978469 W 149.05304029 4546.50 66.63 311.26 2602.57 2667.15 2990.70 3045.89 2991.25 1801.09 -2388.24 1.14 5982132.99 616513.94 N 70.35994219 W 149.053572 4641.99 65.77 311.97 2641.11 2705.69 3077.91 3133.25 3078.35 1859.11 -2453.56 1.13 5982189.97 616447.71 ~ N 70.36010064 W 149.054103 4733.86 64.34 311.46 2679.85 2744.43 3761.04 3216.55 3161.39 1914.54 -2515.73 1.64 5982244.40 616384.67 N 70.36025201 W 149.054608 4$30.55 62.61 311.30 2723.03 2787.61 3247.41 3303.06 3247.68 1971.73 -2580.64 1.80 5982300.54 616318.87 N 70.36040818 W 149.05513592 4924.99 59.51 310.07 2768.73 2833.31 3329.96 3385.70 3330.18 2025.61 -2643.30 3.47 5982353.42 616255.37 N 70.36055532 W 149.05564494 5020.39 56.46 308.84 2819.30 2883.88 3410.82 3466.58 3411.01 2077.01 -2705.74 3.38 5982403.82 616192.13 N 70.36069570 W 149.05615222 5115.59 54.72 308.43 2873.09 2937.67 3489.35 3545.12 3489.53 2126.08 -2767.~ 1.85 5982451.91 616130.04 N 70.36082969 W 149.05665043 5209.11 51.77 308.76 2929.05 2993.63 356427 3620.04 3564.44 2172.85 -2825.59 3.16 5982497.73 616070.78 N 70.36095738 W 149.05712589 5304.95 48.92 308.53 2990.20 3054.78 3638.05 3693.82 3638.21 2218.92 -2883.21 2.98 5982542.89 616012.44 N 70.36108320 W 149.05759415 5399.91 46.00 308.28 3054.40 3118.98 3708.00 3763.77 3708.16 2262.39 -2938.03 3.08 5982585.47 615956.94 N 70.36120188 W 149.05803955 5492.48 42.12 309.41 3120.91 3185.49 3772.36 3828.14 3772.50 2302.74 -2988.17 428 5982625.01 615906.17 N 70.36131206 W 149.05844693 5586.3A 38.66 310.00 3192.39 3256.97 3833.15 3888.95 3833.27 2341.58 -3034.97 3.71 5982663.10 615858.77 N 70.36141811 W 149.05882741 5681.12 38.23 310.66 3266.62 3331.20 3892.03 3947.88 3892.14 2379.71 -3079.89 0.63 5982700.52 615813.25 N 70.36152225 W 149.05919214 SurveyEditor Ver SP 2.1 Bld( doc40x_100 ) S-401\S-401\S-401\S-401 current Generated 11/15/2006 12:16 PM Page 2 of 3 ~ Comments Measured Inclination Azimuth Sub-Sea ND ND VeRical Along Hole Closure NS EW DLS Northing Easting Latitude Longkude Depth Section Departure k de de k k ft k k ft ft de 100 ft ftUS ftUS 5774.38 39.22 309.28 3339.38 3403.96 3950.34 4006.22 3950.43 2417.18 -3124.60 1.49 5869.71 38.60 309.88 3413.56 3478.14 401020 4066.09 4010.28 2455.33 -3170.75 0.76 5964.98 37.37 310.32 3488.65 3553.23 4068.79 4124.72 4068.86 2493.70 -3215.61 1.32 6060.09 36.25 310.43 3564.79 3629.37 4125.74 4181.71 4125.79 2530.01 -3259.02 1.18 6153.92 35.83 310.54 3640.66 3705.24 4180.89 4236.92 4180.94 2565.85 -3301.01 0.45 6249.11 35.57 309.98 3717.97 3782.55 4236.40 4292.46 4236.44 2601.75 -3343.39 0.44 6343.96 35.98 309.87 3794.92 3859.50 4291.82 4347.91 4291.85 2637.34 -3385.92 0.44 Last MWD+IFR+~ 6421.40 36.26 309.82 3857.47 3922.05 4337.45 4393.56 4337.47 2666.58 -3420.97 0.36 TD ( Projected ) 6490.00 36.26 309.82 3912.79 3977.37 4378.01 4434.13 4378.03 2692.57 -3452.13 0.00 Survey Type: Definitlve Survey NOTES: GYD GC SS -( Gyrodata - gyro single shots -- Gyrodata gyro orientation surveys. Not to be run above 70 degrees inclination. ) ~Wp + IFR + MS -( In-fleld referenced MWD wfth mult-station analysfs and correction appHed in post-processing. Assurrces a BHA sag correction 1s applied to eni~ance inclinaUon accuracy. ) Leasl Descrlotion: Northing (1~ [ftUS] Easting (X) [ftUS] Surface : 4166 FSL 4503 FEL S35 T12N R12E UM 5980370.20 61893026 BHL : 1578 FSL 2672 FEL S27 T12N R12E UM 5983007.40 615436.12 5982737.27 615767.95 N 70.36162457 W 149.05955545 5982774.68 615721.20 N 70.36172873 W 149.05993043 5982811.72 615675.76 N 70.36183185 W 149.06029486 5982847.94 615631.77 N 70.36193264 W 149.06064762 5982883.11 615589.22 N 70.36203051 W 149.06098879 5982918.33 615546.27 N 70.36212853 W 149.06133322 5982953.23 615503.20 N 70.36222569 W 149.06167876 5982981.92 615467.69 N 70.36230555 W 149.06196355 5983007.40 615436.12 N 70.36237649 W 149.06221678 i CJ SurveyEditor Ver SP 2.1 Bld( doc40x_100 ) S-401\S-401\S-401\S-401 current Generated 11/15/2006 12:16 PM Page 3 of 3 TREE „- CIW 7" 5M WE~ 'HEAD = WLAY FMC ~~ ACTUATOR = ~ K . ELEV -_ . - 6q.6' _ BF. ELEV = z_ 39' KOP = ~ Max Angle = _ __ Datum MQ = ~w. . . Datum 7VD = 305' 75 @ 3009' _ . .. - ~1 G rave I ck PRINCE CREEK WATER SUPPLY WELL ~ ~£ .~~.~~ I20" CSG, 91.1#, H-40 I-1 '~ p~' ~ ~ 13-318" CSG, 68#, L-80, ID = 12.415" 2323' RA MARKER 2345~ ~ I-W IRE, C}D = 0.25" ~ SAFETY NOTES: )#1 ESP PdWER CABLE W/ TECH WIRE IN ARMOR WRAP I 225~5' ~-j7", 'R' Nipple; ID = 5.963" ( 2323~ 13-318" x 9-5/8" Xfl 5-1/5", 'X Nippie; IC} = 4.562" Minimum Gravel Pack Restriction = 3,52" Safety Shear Sub @ 4064' 5-1/2" IBG, 17#, L-80, .0232 pbf, ID = 4.892" ~72~' 9-51$" CSG, 40#, L-80, ID =$.835" ~-{ 4294~ PERFC3RATION SUMMARY REF LOG: MWD Vision Resistivity ANGLE ATTQP PERF: 36° Note: Refer to Production DB for histaricaE perf daEa SIZE SPF INTERVAL Opn/Sqz DATE 4 5/8" 21 6210' - 6300' O 06/18/07 4 5/8" 21 6320' - 6350' O 06/18IQ7 4 5I8" 21 6398' - 6415' O Q6/18/Q7 3712~ ~NES SYMPHONY GAUGE WITH I- W IRE, OD=0.25" 3735~ CENTRILIFT DISCN HEAD, O~ = 7.25" 3736~ CENlRiLIFT HPHV PUMPS, OD = 6.75" 3766~ CENTRILIFT TANDEM SEALS, OD = 6.75" 3781~ CENIRILFITHMi MOTORS {2}, OD=7.25" 3830~ 6-FIN CENIRILIZER, OD = 8.0" 4153~ BKR'Z~' LINER TOP PKR, ' ID = 6.18" 6067~ BKR SC-1 GRAVEL PAGK PKR ~075' BKR 80-40 SLIDING SLV 6095~ BKR GPR-24 {63K) SHEAR QUT JOINT 6098~ 4-112" BLANK PIPE, L-80, SLHT 6176~ BKR 4" EXCLUDER SCREEN MEDIUM, 9.5# r FT, 2~?4', 3D = 3.548" IBAKER'S-22' SNAP LATCH ASS. ~ 7" LNR, 26#, L-80, ID = 6.276" ~-{ 6564~ PBTD F47~~ 70 6564' v1ENTS ~ on ~t}~2' ~-{$AKER FA-1 PKR - WL SET 6I17107 PRINCE CREEK WELL: S-401 PERMET No: 206-078 API No: 50-d29-23313-04 SEC 35, T12N, R12E, 4167' NSL & 4503' WEL BP Eup~oration {Alaska) 06/15/07 ~ ~ Schiumherger Alaska Data & Consulting Services 2525 Gambell Street, Suite 400 Anchorage, AK 99503-2838 ATTN: Beth ~ -O°~'`6 Well _Inh 8 I nn Ilncr.:n4inn NO. 4304 Company: State of Alaska Alaska Oil & Gas Cons Comm Attn: Christine MahnkE~n 333 West 7th Ave, Suite 700 Anchorage, AK 99501 Field: Prudhoe Bay n~*e n~ r..i... rn P1-16 11637331 WARMBACKS & SBHPS 05/04/07 P1-14 11637332 WARMBACKS 8 SBHPS 05/05/07 1 01-05 11626486 USIT (CEMENT) 05/13107 1 07-05 11626486 USIT (CORROSION) 05/13/07 1 MPH-14 11638633 INCIINOMETER-DIRECTION LOG 05/13l07 1 MPS-07A 1159454 MDT 05/28107 1 11-18 11626097 USIT 05/26/07 1 09-15A 11629015 SCMT 06/01/07 1 12-12A 11695061 CEMENT IMAGE & BOND LOG 05/28/07 1 03-36A 11629014 SCMT 05/31107 1 S-401 11626492 SCMT 06/11/07 1 r~cr.~~ hVnt~VYYLGLJVC RCVCIrI O7 JIV1711YV A17V RCIURIVIIYV VIYC VVYT CA1+17 IV: BP Exploration (Alaska) Inc. Petrotechnical Data Center LR2-1 900 E. Benson Bivd. { :`~' '' ~, ~ ~t +-~-~ Anchorage, Alaska 99508 4 '^,~~r~,~~ ~'~ ~~~~ ~~~~_-~~~~ Date Delivered: r.. f ., /. l ~1~{~~ , 3pl ~~ + i~~ ~:;r~l~~. ~~~e~l~r'~1~~%!~~1~ ~~t~~s~~x~4[?R `~`d,~ Alaska Data & Consulting Services 2525 Gambell Street, Suite 400 Anchorage, AK 99503-2838 ~ ATTN: Beth / /, ,.. Received by: ~,_~_- osizsio~ ~ ~ Schlum6erger Schlumberger-DCS 2525 Gambell St, Suite 400 Anchorege, AK 99503-2838 ATTN: Beth Well Job # ~V i~~ V Lag Description Date NO. 4267 Company: Alaska Oi~ & Gas Cons Comm Attn: Cbristine Mahnken 333 West 7th Ave, Suite 700 Anchorage,AK 99501 Field: Aurora Orion Polaris BL Color CD V-277 40014668 OHEDITMWDILWD 01/12107 2 1 S•401 40014121 OH EDIT MWDILWD 10/21/O6 2 1 5-401PB1 40014121 OH EDIT MWDILWD 10/08106 2 1 W-210 11708631 MDT 02127/07 1 PLEASE ACKNOWLEDGE RECEIPT BV SIGNING AND RETURNING ONE COPY EACH TO: BP Expbration (Alaska) Inc. s ~~ r-1 .. ~ ~ ""T ~3~.+, ~ '`!~ ~ Petrotechnical Data Center LR2-1 ~~~~ „ M•^ L 900 E Benson Blvd. - Anchorage AK 99508-4254 ~1~~ ~ ~ 2007 Date Delivered ~ J~,~i~~'i~v~ r,`~I~.:tr, (y~~ ~>l311C,. ~,C,~~i4(1~15~l6~~`P, ~.d'~;~~".`?i`~~n ~~~j`~~O ~~ ~/5~~ SchlumbergervDCS 2525 Gambell St, Suite 400 Anchorage,AK 99503-2838 ~ ATTN: Beth ry ; Received by~ -..--.......-. ~ ~ , . . • ~ ~w, ~~ ~ ~ ~ ~~ ~~ ~ s ~ , {} ~ ~ ~ ~ ~..~ 6...~;_.~ ;,,,1~~. "A-~ ~ ~„ SARAH PAUN, GOVERNOR `"1OxL+~p1RQ~O ~II~ ~ 333 W. 7thAVENUE, SUITE 100 ~i~ ~~~ ~ ANCHORAGE, ALASKA 99501-3538 PHONE (907) 279-1433 F~C (907) 276-7542 Robert Tirpack Senior Drilling Engineer BP Exploration Alaska PO Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Field, Ugnu Undefined Water Source Pool, PBU 5-401 Sundry Number: 307-178 Dear Mr. Tirpack: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659-3607 (pager). As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for rehearing. A request for rehearing is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or t:he next working day if the 23rd day falls on a holiday or weekend. A person may not appeal a Commission decision to Superior Court unless rehearing has been requested. DATED this~lday of May, 2007 Encl. Sincerelv_ ~?S S ATE30F A~LASKA fj~' t~~, ~~~ ~ ~ S-a 9-0~ ALASKA OIL AND GAS CONSERVATION COMMISSIO I~~~,~~ v~~ APPLICATION FOR SUNDRY APPROVALMAY 2 5 2Q07 2o aac 2s.2so ~Q~,~~~i,, 1. Type of Request: ^ Abandon ^ Suspend ^ Operation Shutdown (~[ P~~ ~~ir~~~ory,~mtSSiGi1 t~ ^ Alter Casing ^ Repair Welf ^ Piug Perforations ^ Stimulate ~ R~~j~~~pended Weil ~g~y~3~ i~~ ^ Change Approved Program ^ Pull Tubing ^ Perforate New Pool ^ Waiver ~ Other Restart O erations f/ O s Shutdown 2. Operator Name: 4. Current Well Class: 5. Permit To Drill Number BP Exploration (Alaska) Inc. ^ Development ^ Exploratory 206-078 (306-375) - 3. Address: ~ Service ^ Stratigraphic 6. API Number: P.O. Box 196612, Anchorage, Alaska 99519-6612 50-029-23313-00-00 ' 7. If perforating, closest approach in pool(s) opened by this operation to nearest 8. Well Name and Number: property line where ownership or landownership changes: 9500' PBU S-401 - Spacing Exception Required? ^ Yes ~ No 9. Property Designation: 10. KB Elevation (ft): 11. Field / Pool(s): ADL 028258 ~ 64.58' ~ Prudhoe Bay Field / Ugnu - 12• PRESENT WELL GONDITION SUM MARY ` 7otal Depth MD (ft): Total Depth ND (ft): Effective Depth MD (ft): Effective Depth ND (ft): Plugs (measured): Junk (measured): 6566 4036 6476 3965 None None asin Len th Size MD ND Burst Colla se S r ctural n r 1' 2" 10 ' 105' Surface 4266' 13-3/8" x 9-5/8" 4295' 2573' 49 0 2270 Intermediate Production 2411' 7" 4152' - 563' 2522' - 4033' 16 7 Liner Perforation Depth MD (ft): Perforation Depth ND (ft): Tubing Size: Tubing Grade: Tubing MD (ft): None None Kill String: 4-1/2", 12.6# L-80 2524' Packers and SSSV Type: None Packers and SSSV MD (ft): None 13. Attachments: 14. Well Class after proposed work: ~ Description Summary of Proposal ^ BOP Sketch ^ Exploratory ^ Development ~ Service ^ Detailed Operations Program 15. Estimated Date for 16. Well Status after proposed work: 4't+2~ e Commencin O erations: June 12, 2007 ^ Oil ^ Gas ^ Plugged ^ Abandoned 17. Verbal Approval: Date: ^ WAG ^ GINJ ^ WINJ ^ WDSPL Commission Representative: 18. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Phii Smith, 56a-a897 Printed Name Robert Tirpack Title Senior Drilling Engineer Prepared By Name/Number: Signature Phone 564-4166 Date .~~>..~'' Terrie Hubble, 564-4628 Commission Use Onl Sundry Number:~~~_~ ?8- Conditions of approval: Notify Commission so that a representative may witness ^ Plug Integrity ~BOP Test ^ Mechanical Integrity Test ^ Location Clearance ~~~~~; 3eP~- °~'~~~-~ a~~ -~o c>xfec'c~ 7~s 6ei~cftx.~ -~sis Other: Subsequent Form Required: ~ p_ c~¢ I V_ ~ APPROVED BY O A roved B: OMMISSIONER THE COMMISSION Date ~''~ ~ 07 Form 10-403 Revised 06/2006 L,,,/ Submit In Duplicate p R ~ ~ NA ~.~~~~~ ,,~~, ~~ ~~ ~ • ~~ To: Tom Maunder - AOGCC Date From: Phil Smith - BPXA GPB Rotary Drilling May 24, 2007 Subject: S-401 Application for Sundry Approval - Re-entry for gravel pack completion Reference: API # 50-029-23313-00 ~ ,/ / Approval is requested for the proposed re-entry of S-400 to perforate, gravel pack and complete the well with an ESP on tubing. Operations were shut down last year after a failed attempt to run expandable screens left the well with an unperforated 7" liner through the production zone. The S-400 gravel pack is scheduled for Nabors rig 9ES. Current estimates have it beginning around June 25'h, 2007 following the completion of the V-222i rig well construction. The pre-rig work for this operation is planned to begin as soon as the attached Application for Sundry is approved. Current Condition: / Fully cemented, unperforated 7"26# production liner through target sands. / 4%" 12.6# freeze protection string surface to 2524' MD. / Pressure tested well to 3500 psi 10/24/06 immediately prior to rig release. ~ / Fresh water in production liner, 8.5 ppg seawater above liner, diesel to 2200: / BPV in tubing hanger Scope Notify the field AOGCC representative with intent to plug and abandon Pre-Riq Work: 1. Bleed well pressure to zero, pull BPV. 2. RU memory SCMT on slickline and log the 7" liner from PBTD of 6476' to top of liner at 4152' 3. Set BPV. 4. Pressure test the well to 3000 psi via annulus valve. Monitor tubing pressure to ensure BPV is competent. Bleed annulus pressure to zero. Rig Operations: 1. MI / RU Nabors rig 9ES 2. Pressure test the well to 3000 psi via annulus valve / 3. Pull BPV with lubricator 4. Circulate out diesel freeze protection and displace the well to seawater. Set TWC. 5. Nipple down tree. Nipple up and test BOPE to 3,OOOpsi. Pull TWC. ~'` 6. Pull 4'/2" tubing, install wear ring. 7. RIH with 6 1/8" bit and casing scrapers to PBTD 8. Reverse circulate the well to 9.1 ppg KCI brine. Employ Dirt Magnet sweeps and circulate until returns reach 50 ntu. 9. RU e-line. Set Baker Model FA packer 6420' MD. 10. RIH DPC perf guns and perforate 6210-6300, 6320-6350, and 6398-6415. 11. RIH with dummy ratchet latch on drillpipe. Confirm latch up into FA packer top. POH. S-401 Application for Sundry C~ ~ 12. RIH with 222' of Baker Excluder screen assembly and SC-1 packer. 13. Latch into FA packer and set the SC-1 packer 14. Pickle the 4" drillpipe with 500 gallons HCI acid 15. Perform step rate test and matrix acid treatment followed by gravel pack ~ 16. Complete well with 1000 HP ESP on 7" production tubing ~" 17. Set TWC, ND BOP and NU tree. Test tree to 5000 psi. /~ 18. Pull TWC and freeze protect well to 2200' with 310 bbls diesel. 19. Set BPV Secure the well. Rig down and move off. Post-Riq Work: 1. Install well house and instrumentation 2. POP well to test unit until cleaned up. Estimated Pre-rig Start Date: 06/01/2007 Estimated RWO Start Date: 06/25/2007 Phil Smith Operations Drilling Engineer 564-4897 office 240-8072 cell S-401 Application for Sundry ~ Tree: CIW 7" 5M Wellhead: FMC Big Bore 20" 131.45 ppf, X-56 105` NOTE: 41/2" Tubin 4.5" 12.6#, L 80 NSCT. 2524 4.5" 12.6#, L 80 524` 13 3/8 68 ppf, L-80 BTCm 2323' RA Tag 2345 ~ I 9 5/8" 40 ppf, L-80 BTCm 4294 S-401 Orig. DF elev. = 64.4' Orig. Cellar elev. = 35.9' top MD 7" BKR LNR HGR/PKR 4,152 7" Landing Collar 7" LNR Shoe 8 1/2" Driller's TD 6476 6564` 6566` DATE REV. BY COMMENTS 5/18/07 PGS re- Gravel Pack S-Pad Well S-401 WSW API NO: 50-029-23313 BP EXPLORATION S-401 prppqsed ~ ~ I __ - - -_ - Tree: CIW 7" 5PA ~+ p Grig. DF eleu. = cd.d' v~klihes~+: FMC Big Bore L~~~~ r r~~}~'~~~ Grig. Cellsrelev. =:5.4' ~C~~ 7'.-1.45 ppf, X-5c 10B 7"~~# L•80 6TC-R.~ T6G 2300' ( T' R Nipple 7Fgp~ 'Ic :~ rS ppf, L-8C BTCrn 2328 ' 3650' RA Ts~ 2~as 5 1!7 ~{ Nipple 5" 17# L-SO 6TC-M1.~ T6G 3J35' 5 HES''3ymphorn,.~ Qa~~~e 3700' . tuJESP cskde GentriliFt 5r ats~e HC-'_:CCC 3735' c75 ESP, c.75.' GL~' CentriliFt H~T'.-48 EHL PFS , aesl 3ecti or 3772 t.entrilift ~eriea,HM1AIHE 3$00' 7CCC hp aerie~ 725 rnobor •' 7" BKR LNR HGR/PKR 4,152 4 516 dC ppf, L-SC BTCrn 4294 {S.8'.-5" ID} Bsker 5C-'I Pscker ~ ~rsvel Psek E~en3ion ~ Shesr Gut Ssfety Joint ~ Blsnk Pipe, 4 712" 77.E~` ~ c•esch E~acluder '?CCC 3creana Tvp Perf 6210' ~ ~~~05 Bottom Perf ~d1 ~' ~ 5•225nsp•Lstch Raaembly }6430 Bsker F~4 Pscker ~ ' 5-401 Proposed Gravel Content-Description: 5-401 Proposed Gravel Pack.bmp',' Content-Type: image/bmp Content-Encoding: base64 1 of 1 5/30/2007 2:24 PM E w ~ ~ ~ l O ~ ~ SCHLUMBERGER Survey report Client ...................: BP Exploration Alaska Field ....................: Aurora (Prince Creek) Well ...................... 5-401 API number ...............: 50-029-23313-00 Engineer .................: F. Bezerra RIG :...................... NABORS 7ES STATE :.................... Alaska ----- Survey calculation methods------------- Method for positions.....: Minimum curvature Method for DLS...........: Mason & Taylor ----- Depth reference ---- Permanent datum..........: Depth reference..........: GL above permanent.......: KB above permanent.......: DF above permanent.......: ------------------ MEAN SEA LEVEL Driller's PipeTally 36.10 ft N/A Top Drive 64.58 ft ----- Vertical section origin---------------- Latitude (+N/S-).........: 0.00 ft Departure (+E/W-)........: 0.00 ft ----- Platform reference point--------------- Latitude (+N/S-).........: 0.00 ft Departure (+E/W-)........: 0.00 ft Azimuth from Vsect Origin to target: 308.12 degrees 22-Oct-2006 06:27:13 Page 1 of 4 Spud date ................. 15-Sept-06 Last survey date.........: 22-Oct-06 Total accepted surveys...: 76 I~ID of first survey.......: 0.00 ft rID of last survey........: 6566.00 ft ----- Geomagnetic data ---------------------- Magnetic model...........: BGGM version 2005 Magnetic date ............: 10-Sep-2006 Magnetic field strength..: 57593.49 GAMA Magnetic dec (+E/W-).....: 24.26 degrees Magnetic dip .............: 80.90 degrees ----- MWD survey Reference Reference G ............... Reference H ............... Reference Dip ............. Tolerance of G...........: Tolerance of H............ Tolerance of Dip.........: Criteria --------- 1002.68 mGal 57637.00 G~ 80.92 degrees (+/-) 2.50 mGal (+/-)300.00 G~1MA (+/-) 0.45 degrees ----- Corrections --------------------------- Magnetic dec (+E/W-).....: 24.09 degrees Grid convergence (+E/W-).: 0.00 degrees Total az corr (+E/W-)....: 24.09 degrees (Total az corr = magnetic dec - grid conv) Survey Correction Type .... I=Sag Corrected Inclination M=Schlumberger Magnetic Correction S=She11 Magnetic Correction F=Failed Axis Correction R=Magnetic Resonance Tool Correction D=Dmag Magnetic Correction ~ ~ ~ SCHLUMBERGER Survey Report 22-Oct-2006 06:27:13 Page 2 of 4 ~ --- -------- ------ ------- ------ -------- -------- -------- -------- ------- -------- ----- - ---- Seq Measured Incl Azimuth Course TVD Vertical Displ Displ Total At DLS Srvy # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool - (ft) (deg) (deg) (ft) (ft) (ft) (ft) (ft) (ft) (deg) 100f) type 1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 BP _GYD CT DMS- Depth Only 2 72.00 0.23 46.16 72.00 72.00 -0.02 0.10 0.10 0.14 46.16 0.32 BP _GYD CT DMS 3 167.00 0.10 311.58 95.00 167.00 0.04 0.29 0.18 0.34 32.04 0.27 BP _GYD CT DMS 4 256.00 0.40 258.00 89.00 256.00 0.31 0.27 -0.18 0.33 326.39 0.39 BP _GYD CT DMS 5 347.00 0.85 236.89 91.00 346.99 0.73 -0.16 -1.06 1.07 261.37 0.55 BP _GYD CT DMS 6 437.00 2.19 254.40 90.00 436.96 1.97 -0.99 -3.27 3.42 253.21 1.56 BP _GYD CT DMS 7 525.00 7.03 286.78 88.00 524.66 7.98 0.12 -10.05 10.05 270.66 6.04 BP _GYD CT ~ DMS 8 614.00 8.66 284.62 89.00 612.82 19.20 3.38 -21.75 22.01 278.83 1.86 BP _GYD CT DMS 9 708.00 10.92 276.69 94.00 705.45 33.29 6.20 -37.45 37.96 279.41 2.79 BP _GYD CT DMS 10 804.00 13.28 279.29 96.00 799.31 50.71 9.04 -57.36 58.07 278.96 2.52 BP GYD CT DMS 11 833.17 12.71 281.36 29.17 827.74 56.51 12 927.28 14.63 285.93 94.11 919.18 76.76 13 979.55 15.26 290.07 52.27 969.68 89.41 14 1021.04 17.07 291.32 41.49 1009.53 100.44 15 1115.52 21.95 289.76 94.48 1098.56 130.49 16 1208.92 26.36 287.14 93.40 1183.76 166.44 17 1303.07 28.56 286.36 94.15 1267.30 206.86 18 1364.07 28.65 288.73 61.00 1320.86 234.20 19 1400.06 28.35 288.68 35.99 1352.49 250.39 20 1435.86 29.01 288.21 35.80 1383.89 266.57 21 1494.92 32.37 288.81 59.06 1434.67 294.96 22 1588.78 34.77 292.20 93.86 1512.88 344.42 23 1683.32 39.28 293.93 94.54 1588.34 399.39 24 1777.09 43.59 294.66 93.77 1658.63 459.64 25 1870.53 46.08 295.68 93.44 1724.88 523.84 26 1965.58 51.84 297.07 95.05 1787.27 594.01 27 2060.73 57.66 298.36 95.15 1842.16 670.40 28 2155.65 62.94 299.89 94.92 1889.17 751.81 29 2250.95 64.11 299.23 95.30 1931.66 836.16 30 2345.06 67.95 300.85 94.11 1969.89 921.29 10.22 -63.81 15.52 -85.40 19.69 -98.20 23.78 -109.01 34.80 -138.56 46.82 -174.82 59.32 -216.40 68.12 -244.24 73.63 -260.50 79.06 -276.80 88.64 -305.38 106.86 -353.95 129.19 -406.30 154.73 -462.83 182.76 -522.45 214.63 -586.63 250.78 -655.37 290.92 -727.35 333.00 -801.56 376.05 -875.97 64.63 279.10 86.79 280.30 100.16 281.34 111.57 282.31 142.86 284.10 180.98 284.99 224.38 285.33 253.56 285.58 270.71 285.78 287.87 285.94 317.98 286.19 369.73 286.80 426.34 287.64 488.01 288.49 553.49 289.28 624.66 290.10 701.71 290.94 783.37 291.80 867.97 292.56 953.28 293.23 2.52 BP_MWA+IFR+MS 2.34 BP_MWD+IFR+MS 2.37 BP_MWD+IFR+MS 4.44 BP MWD+IFR+MS 5.19 BP MWD+IFR+MS 4.86 BP_MWD+IFR+MS 2.37 BP MWD+IFR+MS 1.87 BP MWD+IFR+MS 0.84 BP MWD+IFR+MS 1.95 BP MWD+IFR+MS 5.71 BP_MWD+IFR+MS 3.24 BP_MWD+IFR+MS 4.90 BP MWD+IFR+MS 4.63 BP MWD+IFR+MS 2.77 BP MWD+IFR+MS 6.16 BP_MWD+IFR+MS 6.22 BP MWD+IFR+MS 5.74 BP MWD+IFR+MS 1.38 BP MWD+IFR+MS 4.37 BP MWD+IFR+MS • ~ SCHLUI~ERGER Survey Report 22 -Oct-2006 06:27:13 Page 3 of 4 ~ ________ _______ Seq Measured Incl Azimuth Course TVD Vertical Displ Displ Total At DLS Srvy # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool - --- (ft) -------- (deg) ------ (deg) ------- (ft) ------ (ft) -------- (ft) -------- (ft) ------- (ft) --------- (ft) -------- (deg) ------- 100f) ----- - type _--- 31 2439.86 71.62 301.70 94.80 2002.64 1009.60 422.23 -951.99 1041.42 293.92 3.96 BP _MWD+IFR+MS 32 2533.10 72.25 302.66 93.24 2031.55 1097.76 469.44 -1027.01 1129.22 294.57 1.19 BP _MWD+IFR+MS 33 2627.77 72.76 306.44 94.67 2060.02 1187.86 520.64 -1101.36 1218.22 295.30 3.85 BP _MWD+IFR+MS 34 2724.09 72.46 309.35 96.32 2088.82 1279.76 577.09 -1173.89 1308.07 296.18 2.90 BP _MWD+IFR+MS 35 2818.00 72.04 311.76 93.91 2117.45 1369.12 635.24 -1241.84 1394.88 297.09 2.48 BP _MWD+IFR+MS 36 2914.58 72.69 315.23 96.58 2146.72 1460.73 698.58 -1308.59 1483.38 298.10 3.49 BP _MWD+IFR+MS 37 3009.33 74.92 317.76 94.75 2173.15 1550.74 764.57 -1371.21 1569.97 299.14 3.48 BP _MWD+IFR+MS 38 3103.32 74.59 318.49 93.99 2197.86 1640.04 832.09 -1431.74 1655.98 300.16 0.83 BP ~ _MWD+IFR+MS 39 3198.15 73.98 319.24 94.83 2223.55 1729.72 900.85 -1491.79 1742.69 301.13 1.00 BP _MWD+IFR+MS 40 3290.25 72.50 318.96 92.10 2250.10 1816.30 967.50 -1549.53 1826.77 301.98 1.63 BP _MWD+IFR+MS 41 3383.68 72.96 318.62 93.43 2277.84 1903.97 1034.62 -1608.31 1912.35 302.75 0.60 BP _MWD+IFR+MS 42 3476.47 74.14 318.61 92.79 2304.12 1991.47 1101.39 -1667.14 1998.10 303.45 1.27 BP _MWD+IFR+MS 43 3572.06 74.35 317.01 95.59 2330.07 2082.16 1169.55 -1728.93 2087.35 304.08 1.63 BP _MWD+IFR+MS 44 3668.32 72.94 316.22 96.26 2357.18 2173.50 1236.67 -1792.37 2177.60 304.60 1.66 BP _MWD+IFR+MS 45 3762.00 72.47 316.61 93.68 2385.03 2262.01 1301.46 -1854.03 2265.23 305.07 0.64 BP _MWD+IFR+MS 46 3859.48 70.42 316.32 97.48 2416.05 2353.44 1368.46 -1917.68 2355.88 305.51 2.12 BP _MWD+IFR+MS 47 3954.49 68.06 314.81 95.01 2449.72 2441.52 1431.89 -1979.87 2443.40 305.88 2.89 BP _MWD+IFR+MS 48 4048.37 68.10 312.63 93.88 2484.77 2528.19 1492.08 -2042.81 2529.70 306.14 2.15 BP _MWD+IFR+MS 49 4143.17 69.89 312.42 94.80 2518.75 2616.43 1551.89 -2108.03 2617.66 306.36 1.90 BP _MWD+IFR+MS 50 4234.26 69.08 311.48 91.09 2550.68 2701.55 1608.93 -2171.48 2702.58 306.54 1.31 BP MWD+IFR+MS 51 4355.78 68.53 311.84 121.52 2594.61 2814.63 1684.24 -2256.12 2815.45 306.74 0.53 BP _MWD+IFR+MS 52 4400.00 65.10 313.03 44.22 2612.02 2855.16 1711.65 -2286.12 2855.89 306.82 8.14 BP _MWD+IFR+MS • 53 4437.72 62.51 313.27 37.72 2628.67 2888.87 1734.80 -2310.81 2889.53 306.90 6.89 BP MWD+IFR+MS 54 4530.17 60.50 312.50 92.45 2672.77 2969.84 1790.09 -2370.34 2970.34 307.06 2.29 BP MWD+IFR+MS 55 4627.36 62.60 311.00 97.19 2719.07 3055.11 1846.98 -2434.09 3055.51 307.19 2.55 BP MWD+IFR+MS 56 4720.58 63.10 311.15 93.22 2761.61 3137.95 1901.48 -2496.62 3138.27 307.29 0.56 BP MWD+IFR+MS 57 4814.20 62.51 309.43 93.62 2804.40 3221.15 1955.33 -2560.13 3221.43 307.37 1.75 BP MWD+IFR+MS 58 4910.26 62.18 308.84 96.06 2848.98 3306.23 2009.03 -2626.13 3306.47 307.42 0.64 BP M[nID+IFR+MS 59 5006.51 58.31 308.90 96.25 2896.74 3389.76 2061.46 -2691.18 3389.99 307.45 4.02 BP MWD+IFR+MS 60 5100.72 56.04 309.45 94.21 2947.81 3468.91 2111.46 -2752.55 3469.12 307.49 2.46 BP MWD+IFR+MS i SCHLUMBERGER Survey Report 22 -Oct-2006 06:27:13 Page 4 of 4 1 - _______ _---- Seq Measured Incl Azimuth Course TVD Vertical Displ Displ Total At DLS Srvy # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool - (ft) (deg) (deg) (ft) (ft) (ft) (ft) (ft) (ft) (deg) 100f) type 61 5196.42 52.25 309.69 95.70 3003.85 3546.44 2160.86 -2812.33 3546.62 307.54 3.97 BP _MWD+IFR+MS 62 5289.75 49.08 308.83 93.33 3063.00 3618.60 2206.55 -2868.21 3618.76 307.57 3.47 BP _MWD+IFR+M5 63 5385.18 47.42 308.93 95.43 3126.55 3689.79 2251.23 -2923.63 3689.94 307.60 1.74 BP _MWD+IFR+MS 64 5478.83 45.26 309.47 93.65 3191.20 3757.52 2294.05 -2976.13 3757.66 307.63 2.34 BP _MWD+IFR+MS 65 5572.51 42.62 310.87 93.68 3258.65 3822.48 2335.96 -3025.81 3822.59 307.67 3.00 BP _MWD+IFR+MS 66 5668.66 38.91 315.04 96.15 3331.47 3885.00 2378.65 -3071.79 3885.08 307.75 4.78 BP _MWD+IFR+MS 67 5760.02 38.33 320.18 91.36 3402.87 3941.20 2420.72 -3110.22 3941.23 307.89 3.57 BP _MWD+IFR+MS 68 5855.96 38.75 327.58 95.94 3477.95 3998.64 2468.94 -3145.38 3998.64 308.13 4.82 BP • _MWD+IFR+MS 69 5950.25 37.54 333.66 94.29 3552.13 4052.40 2519.62 -3173.96 4052.47 308.44 4.18 BP _MWD+IFR+MS 70 6043.34 38.48 339.45 93.09 3625.50 4102.75 2572.17 -3196.72 4103.06 308.82 3.96 BP _MWD+IFR+MS 71 6138.90 38.29 340.62 95.56 3700.41 4153.11 2627.94 -3216.98 4153.92 309.25 0.79 BP _MWD+IFR+MS 72 6232.52 38.02 340.54 93.62 3774.03 4201.92 2682.49 -3236.21 4203.42 309.66 0.29 BP _MWD+IFR+MS 73 6328.26 38.35 340.75 95.74 3849.28 4251.82 2738.33 -3255.82 4254.27 310.07 0.37 BP _MWD+IFR+MS 74 6422.49 38.54 339.89 94.23 3923.08 4301.40 2793.49 -3275.56 4304.98 310.46 0.60 BP _MWD+IFR+MS 75 6504.60 38.24 341.03 82.11 3987.44 4344.48 2841.54 -3292.61 4349.21 310.79 0.94 BP _MWD+IFR+MS 76 6566.00 38.24 341.03 61.40 4035.67 4376.38 2877.48 -3304.97 4382.09 311.04 0.00 PROJECT TO TD [(C)2006 IDEAL ID10_2C_01] ~1 ~J t ~ ~ a ~+ 1 e ~ °U SCHLUMBERGER Survey report Client .................... BP Exploration Alaska Field ..................... Aurora (Prince Creek) Well ...................... 5-401PB1 API number ................ 50-029-23313-70 Engineer .................: S. Moy RIG :...................... NABORS 7ES STATE :.................... Alaska ----- Survey calculation methods------------- Method for positions.....: Minimum curvature Method for DLS...........: Mason & Taylor ----- Depth reference ---- Permanent datum..........: Depth reference..........: GL above permanent.......: KB above permanent.......: DF above permanent.......: ------------------ MEAN SEA LEVEL Driller's PipeTally 36.10 ft N/A Top Drive 64.58 ft ----- Vertical section origin---------------- Latitude (+N/S-).........: 0.00 ft Departure (+E/W-)........: 0.00 ft ----- Platform reference point--------------- Latitude (+N/S-).........: 0.00 ft Departure (+E/W-)......... 0.00 ft Azimuth from Vsect Origin to target: 308.12 rlegrees 8-Oct-2006 23:04:38 Page 1 of 4 Spud date ................: 15-Sept-06 Last survey date.......... 08-Oct-06 Total accepted surveys...: 74 NID of first survey........ 0.00 ft NID of last survey........: 6490.00 ft ----- Geomagnetic data ---------------------- Magnetic model...........: BGGM version 2005 Magnetic date ............. 10-Sep-2006 Magnetic field strength..: 57593.49 GAMA Magnetic dec (+E/W-).....: 24.26 degrees Magnetic dip .............. 80.90 degrees ----- MWD survey Reference Criteria --------- Reference G ............... 1002.68 mGal Reference H ............... 57637.00 G~ Reference Dip ............: 80.92 degrees Tolerance of G...........: (+/-) 2.50 mGal Tolerance of H............ (+/-)300.00 GAM~1 Tolerance of Dip.........: (+/-) 0.45 degrees ----- Corrections --------------------------- Magnetic dec (+E/W-).....: 24.09 degrees Grid convergence (+E/W-).: 0.00 degrees Total az corr (+E/W-)....: 24.09 degrees (Total az corr = magnetic dec - grid conv) Survey Correction Type .... I=Sag Corrected Inclination M=Schlumberger Magnetic Correction S=Shel1 Magnetic Correction F=Failed Axis Correction R=Magnetic Resonance Tool Correction D=Dmag Magnetic Correction • . e 1 SCHLUMBERGER Survey Report 8-Oct-2006 23:04:38 Page 2 of 4 Seq Measured Incl Azimuth Course TVD Vertical Displ Displ Total At DLS Srvy # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool - --- (ft) -------- (deg) ------ (deg) ------- (ft) ------ (ft) -------- (ft) -------- (ft) -------- (ft) -------- (ft) ------- (deg) -------- 100f) ----- - type ---- --- 1 -------- 0.00 ------ 0.00 ------- 0.00 ------ 0.00 -------- 0.00 -------- 0.00 -------- 0.00 -------- 0.00 ------- 0.00 -------- 0.00 ----- 0.00 - ---- TIP 2 72.00 0.23 46.16 72.00 72.00 -0.02 0.10 0.10 0.14 46.16 0.32 BP _GYD CT DMS 3 167.00 0.10 311.58 95.00 167.00 0.04 0.29 0.18 0.34 32.04 0.27 BP _GYD CT DMS 4 256.00 0.40 258.00 89.00 256.00 0.31 0.27 -0.18 0.33 326.39 0.39 BP _GYD CT DMS 5 347.00 0.85 236.89 91.00 346.99 0.73 -0.16 -1.06 1.07 261.37 0.55 BP _GYD CT DMS 6 437.00 2.19 254.40 90.00 436.96 1.97 -0.99 -3.27 3.42 253.21 1.56 BP _GYD CT DMS 7 525.00 7.03 286.78 88.00 524.66 7.98 0.12 -10.05 10.05 270.66 6.04 BP _GYD CT DMS 8 614.00 8.66 284.62 89.00 612.82 19.20 3.38 -21.75 22.01 278.83 1.86 BP _GYD CT DMS 9 708.00 10.92 276.69 94.00 705.45 33.29 6.20 -37.45 37.96 279.41 2.79 BP _GYD CT DMS 10 804.00 13.28 279.29 96.00 799.31 50.71 9.04 -57.36 58.07 278.96 2.52 BP _GYD CT DMS 11 833.17 12.71 281.36 29.17 827.74 56.51 12 927.28 14.63 285.93 94.11 919.18 76.76 13 979.55 15.26 290.07 52.27 969.68 89.41 14 1021.04 17.07 291.32 41.49 1009.53 100.44 15 1115.52 21.95 289.76 94.48 1098.56 130.49 16 1208.92 26.36 287.14 93.40 1183.76 166.44 17 1303.07 28.56 286.36 94.15 1267.30 206.86 18 1364.07 28.65 288.73 61.00 1320.86 234.20 19 1400.06 28.35 288.68 35.99 1352.49 250.39 20 1435.86 29.01 288.21 35.80 1383.89 266.57 21 1494.92 32.37 288.81 59.06 1434.67 294.96 22 1588.78 34.77 292.20 93.86 1512.88 344.42 23 1683.32 39.28 293.93 94.54 1588.34 399.39 24 1777.09 43.59 294.66 93.77 1658.63 459.64 25 1870.53 46.08 295.68 93.44 1724.88 523.84 26 1965.58 51.84 297.07 95.05 1787.27 594.01 27 2060.73 57.66 298.36 95.15 1842.16 670.40 28 2155.65 62.94 299.89 94.92 1889.17 751.81 29 2250.95 64.11 299.23 95.30 1931.66 836.16 30 2345.06 67.95 300.85 94.11 1969.89 921.29 10.22 -63.81 15.52 -85.40 19.69 -98.20 23.78 -109.01 34.80 -138.56 46.82 -174.82 59.32 -216.40 68.12 -244.24 73.63 -260.50 79.06 -276.80 88.64 -305.38 106.86 -353.95 129.19 -406.30 154.73 -462.83 182.76 -522.45 214.63 -586.63 250.78 -655.37 290.92 -727.35 333.00 -8~1.56 376.05 -875.97 64.63 279.10 86.79 280.30 100.16 281.34 111.57 282.31 142.86 284.10 180.98 284.99 224.38 285.33 253.56 285.58 270.71 285.78 287.87 285.94 317.98 286.19 369.73 286.80 426.34 287.64 488.01 288.49 553.49 289.28 624.66 290.10 701.71 290.94 783.37 291.80 867.97 292.56 953.28 293.23 2.52 BP,MWD+IFR+MS 2.34 BP_MWD+IFR+MS 2.37 BP_MWD+IFR+MS 4.44 BP_MWD+IFR+MS 5.19 BP_MWD+IFR+MS 4.86 BP_MWD+IFR+MS 2.37 BP_MWD+IFR+M5 1.87 BP MWD+IFR+MS 0.84 BP_MWD+IFR+MS 1.95 BP_MWD+IFR+MS 5.71 BP~MWD+IFR+MS 3.24 BP_MWD+IFR+MS 4.90 BP_MWD+IFR+MS 4.63 BP_MWD+IFR+MS 2.77 BP_MWD+IFR+MS 6.16 BP_MWD+IFR+MS 6.22 BP~MWD+IFR+MS 5.74 BP_MWD+IFR+MS 1.38 BP MWD+IFR+MS 4.37 BP_MWD+IFR+MS ~ ~ r t SCHLUMBERGER Survey Report 8-Oct-2006 23:04:38 Page 3 of 4 --- --- Seq -------- -------- Measured ------ ------ Incl ------- ------- Azimuth ------ ------ Course -------- -------- TVD -------- -------- Vertical ------- ------- Displ --------- --------- Displ -------- -------- Total ------- ------- At ----- ----- DLS - - ---- ------ ---- ------ 5rvy Tool # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool Corr - --- (ft) -------- (deg) ------ (deg) ------- (ft) ------ (ft) -------- (ft) -------- (ft) ------- (ft) --------- (ft) -------- (deg) ------- 100f) ----- - type (deg) ---- ------ --- 31 -------- 2439.86 ------ 71.62 ------- 301.70 ------ 94.80 -------- 2002.64 -------- 1009.60 ------- 422.23 --------- -951.99 -------- 1041.42 ------- 293.92 ----- 3.96 - BP ---- ------ _MWD+IFR+MS 32 2533.10 72.25 302.66 93.24 2031.55 1097.76 469.44 -1027.01 1129.22 294.57 1.19 BP _MWD+IFR+MS 33 2627.77 72.76 306.44 94.67 2060.02 1187.86 520.64 -1101.36 1218.22 295.30 3.85 BP _MWD+IFR+MS 34 2724.09 72.46 309.35 96.32 2088.82 1279.76 577.09 -1173.89 1308.07 296.18 2.90 BP M[nID+IFR+MS 35 2818.00 72.04 311.76 93.91 2117.45 1369.12 635.24 -1241.84 1394.88 297.09 2.48 BP _MWD+IFR+MS 36 2914.58 72.69 315.23 96.58 2146.72 1460.73 698.58 -1308.59 1483.38 298.10 3.49 BP MWD+IFR+MS 37 3009.33 74.92 317.76 94.75 2173.15 1550.74 764.57 -1371.21 1569.97 299.14 3.48 BP _MWD+IFR+MS 38 3103.32 74.59 318.49 93.99 2197.86 1640.04 832.09 -1431.74 1655.98 300.16 0.83 BP _MWD+IFR+MS ~ 39 3198.15 73.98 319.24 94.83 2223.55 1729.72 900.85 -1491.79 1742.69 301.13 1.00 BP MWD+IFR+MS 40 3290.25 72.50 318.96 92.10 2250.10 1816.30 967.50 -1549.53 1826.77 301.98 1.63 BP MWD+IFR+MS 41 3383.68 72.96 318.62 93.43 2277.84 1903.97 1034.62 -1608.31 1912.35 302.75 0.60 BP MWD+IFR+MS 42 3476.47 74.14 318.61 92.79 2304.12 1991.47 1101.39 -1667.14 1998.10 303.45 1.27 BP MWD+IFR+MS 43 3572.06 74.35 317.01 95.59 2330.07 2082.16 1169.55 -1728.93 2087.35 304.08 1.63 BP MWD+IFR+MS 44 3668.32 72.94 316.22 96.26 2357.18 2173.50 1236.67 -1792.37 2177.60 304.60 1.66 BP MWD+IFR+MS 45 3762.00 72.47 316.61 93.68 2385.03 2262.01 1301.46 -1854.03 2265.23 305.07 0.64 BP MWD+IFR+MS 46 3859.48 70.42 316.32 97.48 2416.05 2353.44 1368.46 -1917.68 2355.88 305.51 2.12 BP MWD+IFR+MS 47 3954.49 68.06 314.81 95.01 2449.72 2441.52 1431.89 -1979.87 2443.40 305.88 2.89 BP M[n1D+IFR+MS 48 4048.37 68.10 312.63 93.88 2484.77 2528.19 1492.08 -2042.81 2529.70 306.14 2.15 BP MWD+IFR+MS 49 4143.17 69.89 312.42 94.80 251$.75 2616.43 1551.89 -2108.03 2617.66 306.36 1.90 BP MWD+IFR+MS 50 4234.26 69.08 311.48 91.09 2550.68 2701.55 1608.93 -2171.48 2702.58 306.54 1.31 BP M[n1D+IFR+MS 51 4355.78 68.53 311.84 121.52 2594.61 2814.63 1684.24 -2256.12 2815.45 306.74 0.53 BP MWD+IFR+MS 52 4451.77 67.70 311.43 95.99 2630.39 2903.54 1743.41 -2322.69 2904.20 306.89 0.95 BP _ _M[n7D+IFR+MS ~ 53 4546.50 66.63 311.26 94.73 2667.15 2990.70 1801.09 -2388.24 2991.25 307.02 1.14 BP MWD+IFR+MS 54 4641.99 65.77 311.97 95.49 2705.69 3077.91 1859.11 -2453.56 3078.35 307.15 1.13 BP MWD+IFR+MS 55 4733.86 64.34 311.46 91.87 2744.43 3161.04 1914.54 -2515.73 3161.39 307.27 1.64 BP MWD+IFR+MS 56 4830.55 62.61 311.30 96.69 2787.61 3247.41 1971.73 -2580.64 3247.68 307.38 1.80 BP MWD+IFR+MS 57 4924.99 59.51 310.07 94.44 2833.31 3329.96 2025.61 -2643.30 3330.18 307.46 3.47 BP MWD+IFR+MS 58 5020.39 56.46 308.84 95.40 2883.88 3410.82 2077.01 -2705.74 3411.01 307.51 3.38 BP MWD+IFR+MS 59 5115.59 54.72 308.49 95.20 2937.67 3489.35 2126.08 -2767.06 3489.53 307.54 1.85 BP MWD+IFR+MS 60 5209.11 51.77 308.76 93.52 2993.63 3564.27 2172.85 -2825.59 3564.44 307.56 3.16 BP MWD+IFR+MS ~ f SCHLUMBERGER 5urvey Report 8-Oct-2006 23:04:38 Page 4 of 4 --- --- Seq -------- ------ - Measured ------ ------ Incl ------- ------- Azimuth ------ ------ Course -------- - ------ TVD -------- -------- Vertical ------- ------- Displ --------- --------- Displ -------- -------- Total ------- ------- At ----- ----- DLS - - ---- ------ ---- ----- Srvy Too1 # depth angle angle length depth section +N/S- +E/W- displ Azim (deg/ tool Corr - --- (ft) -------- (deg) ------ (deg) ------- (ft) ------ (ft) -------- (ft) -------- (ft) ------- (ft} --------- (ft) -------- (deg) ------- 100f) ----- - type (deg) ---- ------ --- 61 -------- 5304.95 ------ 48.92 ------- 308.53 ------ 95.84 -------- 3054.78 -------- 3638.04 ------- 2218.92 --------- -2883.21 -------- 3638.21 ------- 307.58 ----- 2.98 - BP ---- ------ MWD+IFR+MS 62 5399.91 46.00 308.28 94.96 3118.98 3708.00 2262.39 -2938.03 3708.16 307.60 3.08 BP MWD+IFR+MS 63 5492.48 42.12 309.41 92.57 3185.49 3772.36 2302.74 -2988.17 3772.50 307.62 4.28 BP MWD+IFR+MS 64 5586.34 38.66 310.00 93.86 3256.97 3833.15 2341.58 -3034.96 3833.27 307.65 3.71 BP M[n7D+IFR+MS 65 5681.12 38.23 310.66 94.78 3331.20 3892.03 2379.71 -3079.89 3892.14 307.69 0.63 BP _MWD+IFR+MS 66 5774.38 39.22 309.28 93.26 3403.96 3950.34 2417.18 -3124.60 3950.43 307.73 1.41 BP MWD+IFR+MS 67 5869.71 38.60 309.88 95.33 3478.14 4010.20 2455.33 -3170.75 4010.28 307.75 0.76 BP _MWD+IFR+MS 68 5964.98 37.37 310.32 95.27 3553.23 4068.79 2493.10 -3215.60 4068.86 307.79 1.32 BP ~ _MWD+IFR+MS 69 6060.09 36.25 310.43 95.11 3629.37 4125.73 2530.01 -3259.02 4125.79 307.82 1.18 BP MWD+IFR+MS 70 6153.92 35.83 310.54 93.83 3705.24 4180.89 2565.85 -3301.01 4180.94 307.86 0.45 BP MWD+IFR+MS 71 6249.11 35.57 309.98 95.19 3782.55 4236.40 2601.75 -3343.39 4236.44 307.89 0.44 BP MWD+IFR+MS 72 6343.96 35.98 309.87 94.85 3859.50 4291.82 2637.34 -3385.92 4291.85 307.92 0.44 BP MWD+IFR+MS 73 6421.40 36.26 309.82 77.44 3922.05 4337.45 2666.58 -3420.97 4337.47 307.94 0.36 BP MWD+IFR+MS 74 6490.00 36.26 309.82 68.60 3977.37 4378.01 2692.57 -3452.13 4378.03 307.95 0.00 PROJECT TO TD [(C)2006 IDEAL ID10_2C_01] ~ . CEIVE[7 ~cL ~. ~ ZOQ6 '~ ~I & Gas cons. commfssiq~- Schlumberger Drilling & Measurements ~ MWD/LWD Log Product Delivery Customer BP Exploration (Alaska) Inc. Dispatched To: Christine Mahnken Well No S-401 Date Dispatched 27-0 ct-O6 Installation/Rig Nabors 7ES Dispatched By: Emil Guliyev Data No Of Prints No of Floppies Surveys 2 1 Received By: Please sign and return to: Drilling & Measurements LWD Division 2525 Gambell Street, Suite 400 Anchorage, Alaska 99501 nroseiC~slb.com Fax:907-561-8317 LWD Log Delivery V1.1, 10-02-03 ~~ ~ - 67~ a~~-~~g ~ ~ ~ ~ FRANK H. MURKOWSKI, GOVERNOR 333 W. T" AVENUE, SUITE 100 ANCHORAGE, ALASKA 99501-3539 PHONE (907) 279-1433 FAX (907) 276-7542 Robert Tirpack Senior Drilling Engineer BP Exploration (Alaska) Inc. PO Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Field, Ugnu Undefined Water Source Pool, PBU 5-401 Sundry Number: 306-375 Dear Tirpack: Enclosed is the approved Application for Sundry Approval relating to the above referenced well. Please note the conditions of approval set out in the enclosed form. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659-3607 (pager). As provided in AS 31.05.080, within 20 days after written notice of this decision, or such further time as the Commission grants for good cause shown, a person affected by it may file with the Commission an application for rehearing. A request for rehearing is considered timely if it is received by 4:30 PM on the 23rd day following the date of this letter, or the next working day if the 23rd day falls on a holiday or weekend. A person may not appeal a Commission decision to Superior Court unless rehearing has been requested. DATED this ~ da of December, 2006 ~ y Encl. a (~(P - o~~ u ,~ ~~ ~ ~'~'~ ~~~ Z"°~ ~~~ ~~ ~'Z 1'O~TATE OF ALASKA ~,~ i 1 ALA~;31~1~IL AND GAS CONSERVATION COMMI~~JI~QN NOV 2 ZOQ6 ~' ~ i l~' " 1~~ APPLICATION FOR SUNDRY APPROVAL 20 ,~C 25.2so ~ Aiaska Oil & Gas Cons. Commission . 1. Type of Request: ^ Abandon ^ Suspend ~ Operation Shutdown ^ Perforate ^ Time Extension ^ Alter Casing ^ Repair Well ^ Plug Perforations ^ Stimulate ^ Re-Enter Suspended Well ^ Change Approved Program ^ Pull Tubing ^ Perforate New Pool ^ Waiver ^ Othe~ 2. Operator Name: 4. Current Well Class / 5. Permit To Drill Number BP Exploration (Alaska) Inc. ^ Development ^ Exploratory 206-078 ~ 3. Address: ^ Stratigraphic ~ Service 6. API Number: / P.O. Box 196612, Anchorage, Alaska 99519-6612 50-029-23313-00-00 7. If perforating, closest approach in pool(s) opened by this operation to nearest 8. Well Name and Number: property line where ownership or landownership changes: PBU S-401 ~ Spacing Exception Required? ^ Yes ~ No 9. Property Designation: 10. KB Elevation (ft): 11. Field / Pool(s): ADL 028258 64.58' Prudhoe Bay Field / Ugnu 12~ PRESENT WELL CONDITIQN SUM MARY Total Depth MD (ft): Total Depth TVD (ft): Effective Depth MD (ft): Effective Depth ND (ft): Plugs (measured): Junk (measured): 6566 4036 6476 3965 None None asin L n h iz MD T1/D Burst Colla se Str tural Con r 1' 2" 1' 105' Surface 4266' 13-318" x 9-5/8" 4295' 2 73' 4930 2270 Intermediate Pr i n 2411' 7" 41 2' - 6563' 2522' - 4 33' 1 0 7020 Liner PerForation Depth MD (ft • Perforation Depth ND (ft): Tubing Size: Tubing Grade: Tubing MD (ft): None None Kill String: 4-1/2", 12.6# L-80 2524' Packers and SSSV Type: None Packers and SSSV MD (ft): None 13. Attachments: 14. Well Class after proposed work: ~ ~ Description Summary of Proposal ^ BOP Sketch ^ Exploratory ^ Development ~ Service ^ Detailed Operations Program ~ 15. Estimated Date for 16. Well Status after proposed work: Commencin O erations: Oc ber 25 2006 ^ Oil ^ Gas ^ Plugged ^ Abandoned 17. Verbal Approval: ^ WAG ^ GINJ ^ WINJ ^ WDSPL Commission Representative: 18. I hereby certify that the foregoing is true and correct to the best of my knowledge. Contact Phil Smith, 564-4897 Printed Name Robert Tirpack Title Senior Drilling Engineer /~ Prepared By Name/Number: ~ Signature !~ 9~-'~'j~ ~ Phone 564-4166 Date j~ ~~ Terrie Hubble, 564-4628 Commission Use Onl Sundry Number: ~p , 3~S Conditions of approval: Notify Commission so that a representative may witness ^ Plug Integrity ^ BOP Test ^ Mechanical Integrity Test ^ Location Clearance other: ~~~~~ ~~~.. Cl~=r:; f1=~ 2006 wt,1~Qd ~'n I~t~S~~/ l t~/G`'~"~'P' • '~C~ 3 1( uired: ~ l~ / w. Subse uent Form Re ~j - q q U APPROVED BY ~ ~},/7 ~ ~~ A roved B: OMMISSIONER THE COMMISSION Date Form 10-403 Revised 06/2006 ~/ ~_ Submit In Duplicate ~~~~`' ~ ~ Page 1 of 2 . ~ Hubble, Terrie L From: Smith, Phil G (ASRC) Sent: Tuesday, November 28, 2006 12:40 PM To: Hubble, Terrie L Subject: RE: S-401 open hole sidetrack The production section of S-401 was cased and cemented after the openhole sidetrack. Original ns o run expandable screens were no longer viable therefore a cased hole gravei pack is necessary. The well was s, spen d with a 2500' freeze/protection string with 320 bbis of diesei on 8.6 ppg seawater to allow time for pianning t` el pack completion. The gravei pack and ESP completion is scheduled for February 2007./ From: Hubble, Terrie L Sent: Tuesday, November 28, 2006 10:07 AM To: Smith, Phil G (ASRC) Subject: RE: S-401 open hole sidetrack No, f don't think you need to call Winton. Just please write up a short little narrative about what happened and what the plan forward is. I'll prepare the "Application for Sundry Approval" for an Operations Shutdown and I'll attach the current diagram. We really need to get this done. Terrie From: Smith, Phil G (ASRC) Sent: Tuesday, November 28, 2006 9:30 AM To: Hubble, Terrie L Subject: RE: S-401 open hole sidetrack Do you want me to call Winton? We're planning to return in January to do a gravel pack completion. ! From: Hubble, Terrie L Sent: Wednesday, November 22, 2006 2:05 PM To: Smith, Phil G (ASRC) Subject: RE: S-401 open hole sidetrack Hi Phil, You had already sent me this... but I don't think it fits the bill. (Thanks for it though) What I am struggling with now, is not the fact that we have a PB1, but the fact that we opted to not finish the well the way that it was planned to be finished and then we shut down operations, while waiting for the equipment now needed. l still think you did not get permission here to change the ~ scope, and shutdown operations. So, in my view, we still need to do that, even though we are very., late in making the request. Let's get it done on Monday. Thanks! Terrie PS - Happy Thanksgiving to both you and Lisa. 11/28/2006 Page 2 of 2 . From: Smith, Phil G (ASRC) Sent: Wednesday, November 22, 2006 1:37 PM To: Hubble, Terrie L Subject: FW: S-401 open hole sidetrack Hope this helps. Sorry to not cc you on it before. From: Winton Aubert [mailto:winton_aubert@admin.state.ak.us] Sent: Friday, October 20, 2006 3:20 PM To: Smith, Phil G (ASRC) Subject: Re: S-401 open hole sidetrack Phil, AOGCC hereby approves the mechanical sidetrack of PBU S-401 (PTD 206-078), as described below. All other permit stipulations apply. Winton Aubert AOGCC 793-1231 Smith, Phil G (ASRC) wrote: Winton, During hole cleanout operations the S-401 well was inadvertently sidetracked within a tight zone at ~- 4950'NID. The S-401 well had been drilled to a 6490'NID TD at the base of the Ugnu 4a. Hole conditions deteriorated over several days while attempting to install an expandable screen sand control completion to the point of unrecoverable at this point in time. An open hole sidetrack is now planned at 4400'NID, thus abandoning the original S-401 open hole below that point. A thin 20' TVD thick heavy oil / tar bearing zone was observed between 6160'NID-6185'NID in the upper Ugnu 4a. This isolated hydrocarbon zone has not been observed in any nearby offsets, and is not deemed to be a commercially viable target or of concern to the future water production of S-400; it therefore will not be plugged before abandonment. The final bottom hole location will be approximately 150' to the north of the abandoned wellbore. There are no UG4A producers closer than Milne Point. I will call shortly to discuss this with you and request permission to proceed with the sidetrack. Thanks, Phil 11/28/2006 Tree: CIW 7" 5M Wellhead: FMC Big Bore F D LG - DFtAI ~ ~ /. S-4~'I ~Orig. DF elev. = 64.4' Orig. Cellar elev. = 35.9' Lcre~ ~~p p~"~' "~" ~+ ~{-s2~ 20" 131.45 ppf, X-56 ~ 4.5" 12.6#, L 80 NSCT. 4.5" 12.6#, > 0 CK~~1 S~ 13 3/8 68 ppf, L-80 BTC~~ RA Tag 9 5/8" 40 ppf, L-80 BTCm ~ 7" Landing Collar 7" LNR Shoe 8 1/2" Driller's TD DATE REV. BY 10/23/06 LV top MD LNR HGR/PKR 4,152 S-Pad Well S-401 WSW API NU: 50-029-23313 COMMENTS I Suspension Re: 5-401 open hole sidetrack ~ ~ , n / ^ ~ ~ ~ • L~•~• tD Subject: Re: S-401 open hole sidetrack From: Winton Aubert <winton_aubert@admin.state.ak.us> Date: Fri, 20 Oct 2006 15:20:16 -0800 To: "Smith, Phil G (ASRC)° ~PhiI.G.Smith@bp.com> Phil, AOGCC hereby approves the mechanical sidetrack of PBU S-401 (PTD 206-078), as described below. All other permit stipulations apply. Winton Aubert AOGCC 793-1231 Smith, Phil G (ASRC} wrote: ~' Winton, ', During hole cleanout operations the S-401 well was inadvertently sidetracked within a tight zone at ' 4950'MD. The S-401 well had been drilled to a 6490'MD TD at the base of the Ugnu 4a. Hole conditions deteriorated over several days while attempting to install an expandable screen sand control completion to the point of unrecoverable at this point in time. An open hole sidetrack is now planned at 4400'MD, thus abandoning the original S-401 open hole below that point. A thin 20' TVD thick heavy oil / tar bearing zone was observed between 6160'MD-6185'MD in the upper Ugnu 4a. This isolated hydrocarbon zone has not been observed in any nearby offsets, and is not deemed to be a commercially viable target or of concern to the future water production of S-400; it therefore will not be plugged before abandonment. The final bottom hole location will be approximately 150' to the north of the abandoned wellbore. There are no UG4A producers closer than Milne Point. i I will call shortly to discuss this with you and request permission to proceed with the sidetrack. Thanks, ' Phil 1 of 1 10/20/2006 3:20 PM ~ ,~~ ~ ~ ~ ~.' ~~ ~ ~ ~~ ~ ~~ a ~ ~ ~~ ~i ~5~ ~ ~ ? ~~ ~ ' ~ ~~ ~~ L~ COI~TSERQA ~ ~~i~M ~ ~~~~ ~ ~~ J~~~ ,~ ~ "' ~ ~ , ~ ~~ : 3~,_, ~; ~ ' ~ ~~ FRANK H. MURKOWSKI, GOVERNOR i~ J ,~ ~S~~T 0~ Ajse/ ~47 ' 333 W. 7'" AVENUE, SUITE 100 ~Ol` C0~'IIS'sj~~ ,~ ANCHORAGE, ALASKA 99501-3539 ~ PHONE (907) 279-1433 Robert Tirpack F~ ~so~> 2~sasa2 Senior Drilling Engineer BP Exploration (Alaska) Inc. PO Box 196612 Anchorage, AK 99519-6612 Re: Prudhoe Bay Field, Ugnu Undefined Water Source Pool, PBU 5-401 BP Exploration (Alaska) Inc. Permit No: 206-078 Surface Location: 4167' FSL, 4503' FEL, SEC. 35, T 12N, R 12E, UM Bottomhole Location: 1526' FSL, 2583' FEL, SEC. 27, T12N, R12E, UM Dear Mr. Tirpack: Enclosed is the approved application for permit to drill the above referenced service well. This permit to drill does not exempt you from obtaining additional permits or an approval required by law from other governmental agencies and does not authorize conducting drilling operations until all other required permits and approvals have been issued. In addition, the Commission reserves the right to withdraw the permit in the event it was erroneously issued. Operations must be conducted in accordance with AS 31.05 and Title 20, Chapter 25 of the Alaska Administrative Code unless the Commission specifically authorizes a variance. Failure to comply with an applicable provision of AS 31.05, Title 20, Chapter 25 of the Alaska Administrative Code, or a Commission order, or the terms and conditions of this permit may result in the revocation or suspension of the permit. When providing notice for a representative of the Commission to witness any required test, contact the Commission's petroleum field inspector at (907) 659-3607 (pager). DATED this~day of June, 2006 cc: Department of Fish & Game, Habitat Section w/o encl. Department of Environmental Conservation w/o encl. k~i ~,:~~~~~ STATE OF ALASKA ALA~ OIL AND GAS CONSERVATION COMI~ION PERMIT TO DRILL 20 AAC 25.005 ..,~ .^ ~ ! ~f .~. L J U 1 _.; : ; ~, , s.':Y.:~6E~fi. ;~s;~ 1 a. Type of work ~ Drill ~ Redrill ^ Re-Ent ry 1 b. Current Well Class O Exploratory / p Development Gas ~ Service ^ Multiple Zone ^ Stratigraphic Test ^ Development Oil ^ Single Zone 1 c. Specify if well is proposed ' r: ^ Coalbed Methane ^ Gas Hydrates ^ Shale Gas 2. Operator Name: BP Exploration (Alaska) Inc. 5. Bond: ~ Blanket ^ Single Well Bond No. 6194193 11. Well Name and Number: PBU S-401 3. Address: P.O. Box 196612, Anchorage, Alaska 99519-6612 6. Proposed Depth: MD 6234 TVD 3866 12. Fieid / Pool(s): Prudhoe Bay Field / Ugnu 4a. Location of Well (Governmental Section): SurFace: 4503' FEL SEC T12N R12E UM 4167' FSL 35 7. Property Designation: ADL 028258 , , , , . , Top of Productive Horizon: 1240' FSL, 2233' FEL, SEC. 27, T12N, R12E, UM 8. Land Use Permit: 13. Approximate Spud Date: June 30, 2006 Total Depth: 1526' FSL, 2583' FEL, SEC. 27, T12N, R12E, UM 9. Acres in Property: 2560 14. Distance to Nearest Property: 9,500' 4b. Location of Well (State Base Plane Coordinates): Surface: x-618930 y-5980370 Zone-APS4 10. KB Elevation Plan (Height above GL): 65.5 feet 15. Distance to Nearest Well Within Pool: 3750' ~ 16. Deviated Wells: Kickoff Depth: 150 feet Maximum Hole Angle: 68 de rees 17. Maximum Anticipated Pressures in psig (see 20 AAC 25.035) Downhole: 1630 Surface: 1270 ~S. Casin P ram: S ecifieations To - Se#tln ' p th -`Bottam Quanti of Gerrtent,; c.f. or sacks Hole Casin Wei ht Grade Cou lin Len th MD TVD MD TVD includin sta e data Driven 20" 131.5# X-56 Weld 80' Surface Surface 105' 105' 260 sx Arctic Set A rox. 16" 13-3/8" 68# L-80 BTC-M 3370' Surface Surface 3400' 2300' See 9-5/8" Cement Job 16" 9-5/8" 47# L-80 BTC-M 300' 3400' 2300' 3700' 2415' 767 sx AS Lite, 787 sx Class'G' 8-1/2" 7" 29# L-80 VAM-T 2634' 3600' 2377' 6234' 3865' Uncemented, Expandable Screens 19, PRESENT WELL GONDITION SUMMARY (3o be completedifar Redrill and Re-entry Qperatians) Total Depth MD (ft): Total Depth TVD (ft): Plugs (measured): Effective Depth MD (ft): Effective Depth TVD (ft): Junk (measured): Gasing Length Size - Cement Volume MD ` TVD Conductor / Structural Surface Intermediate Production Liner PerForation Depth MD (ft): Perforation Depth TVD (ft): 20. Attachments ~ Filing Fee, $100 ^ BOP Sketch ~ Property Plat ^ Diverter Sketch ~ Drilling Program ^ Time vs Depth Plot ^ Shallow Hazard Analysis ^ Seabed Report ~ Drilling Fluid Program ~ 20 AAC 25.050 Requirements 21. Verbal Approval: Commission Representative: Date: 22. I hereby certify that the foregoing is true and correct. Printed Name Robert Tirpack ~ Si nature . ~ ,~~ Contact Phil Smith, 564-4897 Title Senior Drilling Engineer / Prepared By Name/Number: Phone 564-4166 Date S/~ / Terrie Hubble, 564-4628 Commission Use Only Permit To Drill Number: ,2, 0,~~- D API Number: 50- DZ J~~ 3313 Permit Approval Date: . ~ See cover letter for other requirements Conditions of Approval: '~_~ If box is checked, well may not be used to explore for, test, or produce coalbed methane, gas hydrates, or gas contained shales~ 1`~` 7 Samples Req'd: [] Yes~No ud Log Req'd: ^ Yes~No ~ ~~, ~ ~ [~ ~~ ~O ) St~t~ ~ r..~' . HZS Measures ~ ~es No D' iona Survey Req'd:~Yes ^ No Other: L/ A APPRO Y THE COMMISSIO Date ~~ p f v , COMMISSIONER Form 10-401 Revised 12/2005 `~ ~ / ORlGINAL `-' Submit In Duplicate ~ ~ Well Name: S-401 Drill and Complete Plan Summary ; ~=--~ Tvpe of Well (service / aroducer / iniectorl: rvic (Water Source Well1 ° Surface Location: X= 618,930.3' Y= 5,980,370.2' AS-Bullt 1114' FNL, 777' FWL, Sec. 35, T12N, R12E ~ Target Location: X= 615,880' Y= 5,982,676.00' 1240' FSL, 2233' FEL, Sec. 27, T12N, R12E Bottom Hole Location: X= 615,525' Y= 5,982,957.00' 1526' FSL, 2583' FEL, Sec. 27, T12N, R12E ~ Ri : Nabors 7ES Estimated Start Date: 6/30/2006 O eratin da s to drill: 20.8 MD: 6234' TVD: 3866' KB: 28.5' KBE: 65.5' Well Desi n conventional, slimhole, etc. : 2 Strin Water Producer Ob'ective: Water source well in U nu reservoir Casinq/Tubinq Proqram: Hole Size Csg/ Tb O.D. Wt/Ft Grade Conn / Length Top MD/TVD Btm MD/TVD bkb NA 20" 131.5# X-56 WLD 80' GL 105/105 16" 13-3/8" 68# L-80 BTGM 3370' GL 3400'/2300' 16" 9 5/8" 47# L-80 BTC-M 300' 3400'/2300' 3700'/2415' 8'/2" 7" 29# L-80 Vam Top HT Expandable Screens 2634' 3600'/ 2377' 6234'/3865' Tubin 7" 26# L-80 BTC-M TBD GL TBD Loqqinq Proqram: Surface Drilling: MWD / GR Open Hole: None Cased Hole: None Production Hole Drilling: MWD/GR/Neu/Res/Den/Cal Open Hole: DPC sidewall cores in SV4, SV3, and SV2 Cased Hole: USIT S-401 Drilling Permit Page 1 ~ ~ Mud Program: 16" Surface Hole Mud Properties: ~ Spud - Freshwater Mud Interval Densit Funnel Vis PV YP FL Chlorides PH 0-2416' Base Perm 8.8 - 250-300+ 20-45 50-70 NC-8.0 <1000 9.0-9.5 2416-3700' TD 9.2 . 200-250 20-40 40-50 8.0-7.0 <1000 9.0-9.5 ~ 8'/2" Production Hole Mud Properties: FloPro NT RDF System Interval Densit Funnel Vis PV YP FL H LGS % MBT Surface shoe to TD 8.9 - 9.2 38-50 10-16 18-24 4.0-6.0 9.0-9.5 < 6.0 < 20 Directional: Ver. Anadrill (WP 9) KOP: 250' Maximum Hole An le: 67.6 deg at 2258' MD Close Approach Wells: All wells pass major risk criteria. The closest wells are: S-41 - 14' ~ 433' (7' allowable deviation) S-42 - 19' @ 657' (7' allowable deviation) IFR-MS corrected surveys will be used for survey validation. Surface G ro as re uired until surve s are free from interference. Formation Markers: Formation To s MDbkb TVDss Estimated pore pressure, PPG(EMW) Base of Gubik Gravel 405 339 SV6 1784 1555 8.5 BPRF 2416 1860 8.5 EOCU 2993 2080 8.5 SV5 3255 2180 8.5 SV4 3779 2380 8.5 SV3 4724 2740 8.5 Fault 1 4890 2800 SV2 5181 2980 8.5 SV7 5533 3240 8.5 UG4 5971 3590 8.6 UG4A 6021 3630 8.64 TD 15-20 ft above UG-3 6234 3800 8.6 TD Criteria TD in shale just above top UG3 coal bed, approximately 275' below UG4A top. Do not enter UG3. Pick TD depth from MWD logs to avoid enetration of UG3. I nte rit Testi n: Test Point Depth Test Type EMW Surface Casin Shoe 20' min from surface shoe LOT 10.5 EMW Minimum S-401 Drilling Permit Page 2 ~ ~ Cement Calculations: The following surFace cement calculations are based upon a single stage job using a port collar as a contingency if cement is not circulated to surface. Casina Size I 13-3/8" x 9 5/8" Surface Basis: Lead: Based on conductor set at 110', 2415' of annulus in the permafrost @ 250% excess and 1285' of open hole from~p of tail slurry to base permafrost @ 30°/a excess. Lead TOC: To surface Tail: Based on 300' of 9 5/8" x 16" Open hole +985' MD open hole volume (490'TVD total) + 30% excess + 80' shoe track volume. Tail TOC: At -2415' DAD Total Cement Volume: I Lead ~ 608 bbl / 3414 ft' ,~767'sks of Dowell ARTICSET Lite at 10.7 y 921 ft' ~787~sks of Dowell Premium `G at 15.8 ppg Z,~f/sk. ~ ~ ~ Well Control: Surface hole will be drilled with a diverter. The intermediate/production hole, well control equipment consisting of 5000 psi working pressure pipe rams(2), blind/shear rams, and annular preventer will be installed and is capable of handling maximum potential surface pressures. Based upon the planned casing test of 3500 psi for casing integrity considerations, the~ BOP equipment will be tested to 3500 psi. Diverter, BOPE and drilling fluid system schematics on file with the AOGCC. Production Interval- • Maximum anticipated BHP: 1630 psi @ 3630' TVDss - Base Ugnu • Maximum surface pressure: 1270psi @ surface ~ (based on BHP and a full column of gas from TD @ 0.10 psi/ft) • Planned BOP test pressure: 3500 psi (The casing and tubing will be tested to 3500) ~'~ • Planned completion fluid: 9.1 ppg filtered brine / 6.8 ppg diesel Disposal: • No annular disposal in this well. • Cuttings Handling: Cuttings generated from drilling operations will be hauled to grind and inject at DS-04. • Fluid Handling: Haul all drilling and completion fluids and other Class II wastes to DS- 04 for disposal. Haul all Class I wastes to Pad 3 for disposal. S-401 Drilling Permit Page 3 ~ • DRILLING PROCEDURE SUMMARY Pre-Rig Work: 1. The 20" conductor has been installed. 2. Weld an FMC landing ring for the FMC BB wellhead on the 20" conductor. Install two 4" outlets on the conductor pipe for surface cementing operations. 3. If necessary, level the pad and prepare location for rig move. Rig Operations: 1. MIRU Nabors 7ES. ~ / 2. Nipple up diverter spool and riser. PU 5" DP as required and stand back in derrick. 3. MU 16" drilling assembly with MWD/LWD and directionally drill surface hole to approximately 30' TVD above the base of the SV4 Sands. An intermediate wiper/bit trip to surface for a bit will be performed prior to exiting the permafrost. • 500' of contingency 16" 65 #/ft casing is available to shut off surface flow if necessary. If required, the remainder of the surface hole should be drilled with a bi-center Hycalog on a 9 5/8" PDM. 4. Run and cement the 13-3/8", 68# x 9 5/8" 47# surface casing. ~" • A Tam port collar may be run as a contingency if surface drilling is problematic. 5. ND riser spool and NU casing / tubing head. NU BOPE and test to 350Q psi. / 6. MU 8'h" drilling assembly with MWD/GR/Res/Neu/Den/Caliper and RIH to float collar. Test the surface casing to 3500 psi for 30 minute . 7. Drill out shoe joints and displace well t 8.9 pg drilling fluid with 3% KCI. Drill new formation to 20' below 9-5/8" shoe and perform LOT. ,. 8. Drill ahead with RSS to +/- 6234' MD. Short trip to the casing shoe, CBU. 9. POH, download LWD and caliper data. • Contingent 6-arm caliper if density caliper data is unsatisfactory. • Contingent plug-back and re-drill with OBM if caliper indicates out of gauge hole. 10. RU Schlumberger and sidewall core 45 stations in the SV2-SV4 sands. Be prepared to DPC if necessary. ~° 11. RIH with LWD and 9 5/8" string mill spaced out to wipe the shoe ~/Swap out mud to solids-free for liner at TD and MAD pass the entire open hole up past the RA tag in the /8" casing. 12. POH, LD BHA. /- 13. PU and RIH with Weatherford expandable completion and liner hanger. Set liner hanger, test annulus to 500psi. POOH. 14. PU & RIH with expansion tools on 4" DP. Expand ESS & EZI joints. 15. Open circulation sub and circulate well to 8.9 ppg brine from TD to surface. Spot breaker across screens. 16. Run USIT log across 7" expanded liner to determine formation compliance. Evaluate to determine if re-~ expansion is necessary. 17. Spot breaker across the screens. POH with expansion tools. LDDP. / 18. Run the 7" 26# L-80 BTC-m completion with Y-tool, ESP and pressure gauge mandrel. ~ 19. Install TWC and nipple down the BOPE. Nipple up tree adapter on top of wellhead with 7-1/16" vafve on top. Remove TWC. 20. RU hot oil truck and freeze protect well by reversing in diesel to freeze protect well from 2200' to surface. 21. Rig down and move off. S-401 Drilling Permit Page 4 ~ ~ Job 1: MIRU Hazards and Contingencies - After fresh water broaching to nearby welis while drilling S-122, it is recommended to ensure cement to surface on all wells near new S-pad surface holes. Check the cement levels in the conductor x surface casing annuli in wells S-41, 42, 43, 44 and perform top jobs if necessary. - S-Pad is desi d as an H2S site. Seven wells on the east-west row of wells have measured > 0 p H2S. Well S-216, just north of S-401 produces the highest H2S on the pad at 5 m, measure 5/7/05. Standard Operating Procedures for H2S precautions should be followed at all times. - The cellar area surrounding S-401 should be checked to insure level prior to move in. - Check the landing ring height on the S-401 conductor prior to move-in. The BOP nipple up may need review for space out. Job 2: Drillinq Surface Hole Hazards and Contingencies - There are two close approach issues in the surface hole. S-41 approaches with a center to center distance of 14' at 433' and S-42 approaches within 19' at 650'. Both wells pass major risk criteria. - Hydrates/gas cut mud have been observed in wells drilled on S-Pad. These were encountered in the SV sands near planned casing point (2700'TVD +). - Review the pad data sheet for information on the S-122 surface water broaching. If this occurs while drilling S-401, a contingent 500' string of 16" 65#/ft is available to shut off the shallow zone. The hole will have to be opened to 17'h" while the casing is delivered and the 15.7 ppg Arctic Set I cement ordered. The casing will not be suspended on surface, but held in place with cement and rough cut just below the landing ring. The remainder of the surface hole will have to be drilled with a 12'/" bit and under reamed to 16" to run the 13 3/8" x 9 5/8" surface casing. - Recent well S-121 minor encountered running gravel until about 350' MD and losses that diminished after 500' MD and stopped entirely by 800' MD. Some LCM was added, but with questionable effect. A total of 364 bbls were lost. - The hole must be drilled at <2°/100' DLS (preferably no slides) across the section where the submersible pump will be set (~2250-2400' TVD). Plan the directional work up hole and trip for BHA if necessary to achieve this objective. Job 3: Install Surface Casins~ Hazards and Contingencies - It is critical that cement is circulated to surface for well integrity. 250% excess cement through the permafrost zone (and 30% excess below the permafrost) is planned. A 13-3/8" port collar will be available as a contingency if surface hole drilling is problematic. If used the port collar will be positioned at ±1000'MD to allow remedial cementing. The port collar OD of 15.5" will preclude running if, however, if the 16" contingent casing string is run. - S-400 CBL/USIT showed channel from shoe to top of logged interval. The cause is suspected to be static mud channeling due to mud viscosity and insufficient circulation prior to cement. Ensure the mud and hole are amply conditioned prior to POH for casing. S-401 Drilling Permit Page 5 ~ ~ Reference RPs Note: Check surFace cement level prior to leaving well to establish if cement has slumped. Record depth tagged on Morning Report. If TOC greater than 20' below top of conductor, notify AOGCC and perform top job at an opportune time. Note: In the event that cement is not circulated to surface during the initial surface casing cement job, notify the AOGCC of the upcoming remedial cement work for possible witness of cement to surface. Job 7: Drill 8-1/2" Production Hole Hazards and Contingencies: - Differential Sticking could be a problem if lost circulation is occurring or if the drill string is left stationary for an extended period of time across the permeable Ugnu Sands. - FIT: Perform a FIT (minimum 10.5 ppg EMW to satisfy kick tolerance). KICK TOLERANCE: Based upon the max ect d Ugnu reservoir pressure of 8.8 ppg and 9.0 ppg mud, a 10.5 ppg leak-off will an FINI kick tolerance. Contact Anchorage personnel if FIT is less than 10.5 ppg. Ba '_ pon off-set drilling data, a minimum leak-off of 13 ppg is expected at the 9 $/e° shoe. - Penetration Rate: A gauge hole is required for the success of the expandable liner. Keep ROP's below 100 fph through this section to avoid washouts or ledges. The 8-1/2" hole will be drilled in rotary mode only (no mud motor). A packed drilling assembly should provide minimum deviation from the planned trajectory. - Hole Quality: Open hole diameter must be at least 8.5" and must not exceed 9.25" in the sands and must be less than 9.1" for at least 6 feet within each shale section. DLS must be less than 7°/100' for the expandable screens. - Torque: Add up to 1% ScreenKleen for torque reduction if necessary. - Faults: A single fault crossing is mapped. A 70-ft throw fault will be encountered at --2800' TVDss. The fault has been crossed on several occasions in the past without consequence. - Critical LWD Tools: It is critical to have the density caliper and GR tool in order to identify all of the zones for accurate location of screens and zonal isolation devices. Therefore if either tool ceases to functionst, a trip will be required for replacement. - Well TD: The 7" expandable completion setting point will be determined by depth based on changes in GR/Res curves associated with the top UG4 markers. After seeing these tops, TD will be picked based on 15' MD above the UG3 coal bed. - BOP Test: Minimize the time between drilling 8%z" hole and running expandable completion. Consider doing BOP test or cut and slip before drilling 8'/2" section Job 8: Wellbore Clean Uq and Mud Conditioninq, Catiper Locl 8-1/2" Hole and 9-5/8" Casin Hazards and Contingencies - Wellbore Cleanliness: Damage to the screens while RIH could result in rupture during the expansion process or damage to the elastomers. A dedicated clean out trip will be run to TD including a string mill to dress any i~regularities in the shoe track. - Casing Scraper: Residual cement left within the 9 5/8" casing will prevent setting of the upper completion packer and liner hanger. The wellbore clean out trip will include a casing scraper to scrape the setting areas. S-401 Drilling Permit Page 6 ~ ~~ - Pipe Dope: Note that pipe dope is extremely detrimental to formation and expandable screens. Do not put dope on boxes while POOH after the clean out. Lightly dope pin threads with a paintbrush while running in hole. - Base Plan: Include the density-caliper as a MAD pass across SV-1 and below and across SV-4. The expansion team will use this data to determine 1) if the expandable will be run and 2) if run, the placement of ESS's (screen sections) and EZI's (external zonal isolation sections). - DPC: Running the logs on DP should be anticipated. Schlumberger will have their TLC tools ready, however a wireline-conveyed run should be tried first. Job 9: Run and Expand 7" Liner and Screens Hazards and Contingencies - Hole Quality: Open hole diameter must be at least 8.5" and must not exceed 9.25" in the sands and must be less than 9.1" for at least 6 feet within each shale section - Centralization/Differential Sticking: See centralizer strategy in the Well Plan Summary. Differential sticking could be a problem if lost circulation is occurring or if the liner is left stationary for an extended period or time across the permeable sands. Ensure the casing is centralized across any permeable zones if the casing is !eft stationary while running in hole. - Mud Requirements: See attached MI Mud Program for WBM fluid properties and requirements. - Drill pipe: All drill pipe and drill collars must be drifted to 2.0" - Drill Collars: A combination of ~7 stands of 4-3/4" DC's and ~1000' HWDP will be required to run the expandable liner. All DC's are to be cleaned and inspected prior to picking up. o Secure a short 4-3/4" DC from Anadrill (or Unique Machine). This short DC will be placed among the regular 4-3/4" DC's the above the liner running tools. This short DC will be used with E-Line CCL for depth control to ensure the Expandable liner is set at the correct depth. - Well control: Ensure that a TIW valve with a cross over from 7" 29ppf VAM TOP HT left hand thread to 7" BTC-M casing is made up to a joint of 7" BTC-M casing and ready in the pipe shed (or XO to Drillpipe). - Surface handling of Expandable Tubulars: o The expandable completion must be handled carefully to avoid damage. SurFace scores can initiate failure during expansion. Damage to elastomers could prevent sealing. o Protective donuts will be applied to each ESS and EZI to prevent damage when moving up the skate. o Handling of the equipment will require working within 10 feet of the pipe handling machine to prevent damage when loaded onto the skate. A full risk assessment will be completed and reviewed by drill crews before picking up completion equipment. - Tubulars: All blank pipe and completion components will be shipped to location with storage compound on threads. All pipe will need to be drifted as per Weatherford procedures and threads cleaned. API modified compound will be put on connections. All connections are 7" VAM TOP HT 80ksi yield Special Clearance 90 left hand thread. All lower completion connections will be made using tongs dressed with non marking dyes and monitored using joint analyzed make up equipment. Tubular make up torques are specified in the detailed Weatherford procedures. Verify connection is made up correctly before moving to next joint. S-401 Drilling Permit Page 7 ~ ~ - Space Out and Depth Correlation: It is important to get the EZI devices into the optimum location in the open hole if they are to seal when expanded. Tallies must be discussed and double checked with BP Completion Engineer to eliminate errors. An electric line correlation run will be carried out to double check the location of the expandable completion. - Running in hole: ensure string is self filling; if necessary fill from top every 5 stands and record volumes pumped to check if screens are plugging. Do not rotate at any time. Weatherford engineer to be on rig floor at all times. Minimize time during which string is stationary when completion is in open hole. Do not run into open hole if there is likely to be delays before hanger setting can be achieved. - Mud Temperature: The well and pits should have a uniform temperature for the expansion process. Have Hot Oil services available to heat the mud after RIH if necessary. - Data Acquisition: It is vital to ensure that Epoch system is calibrated, functioning and set up to display key operating parameters on one screen on the rig floor and one remote screen in geo-shack. Expansion data will need to be saved, and downloaded from rig hard drive and processed in Anchorage into a usable ASCII format. - USIT: A USIT will be required to evaluate the expansion results. Job 12: Run Completion Hazards and Contingencies - Watch hole fill closely, verify no light fluids are introduced down hole and verify proper safety valves are on the rig floor while running the completion string. Job 13: ND/NU/Release Riq Hazards and Contingencies - No hazards specific to this well have been identified for this phase of the well construction. S-401 Drilling Permit Page 8 bp Schlumberger WELL S-401 (P9) FIELD Prudhoe Bay Unit - WOA STRUCTURE S-PAD Mapne~ic Pxameiers Surtace Lora~nn AAD1/ Nn>An S~:uu Plw~ws L~ne 0~. US Gnet Miv:nlNneuus AfoGal~. BGGM2a45 O~V tl~.895' Oala JuMp~~~ lal~. N]02!1B0]5 t~wnMi~y SHBC:f59SUiil15 GrqCOnr ~ . Sloi. 51Ut iV~ROI. u~aryTadeI65.50flaEOVeMSIj MagDec ~3a.3tJ' FS tnT W~a933M2 E.uu~y fit89b0011U5 S~IeFa~t09999i606]6 SJ01~P9i SrvyDaie Mar~~ta.2006 0 800 1600 2400 3200 4000 4800 ~ 0 0 ~ c n a~ U ~ ~ F- 0 8~~ 1600 2400 3200 4000 ........................ ~ RTE.....................:..................................:.................................. ~..................................:..................................:..................................:.................... KOP Bld 1.SN00 Bld 2/100 ~..~..~..~..~..~. .~..~..~..~..~..~..~..~ ~..~..~..~..~..~..~..~ .~..~..~..~..~..~..~..~.i~.~..~..~..~..~..~..~.. ..~..~..~..~..~..~..~. ..~..~..~..~..~..~..~..i.. ..~..~..~..~ Crv 3.~SI100 ........................~ ................................:..................................:..................................«..................................:..................................:..................................:.................... ~.:_::_.:::._r. _.. ._.._....:~_~::~:_~:_.~_.~_::1:~_..L'::_.:a:~s~::~:1~:_'::1~:::~_.:a:~_'.:'_:~_::'_::'a:._:::~:::._:~_:~:~:t~:a::_.:_.:_l:_.:_:~_:~_:~1:~a~:s::_::~, 0 ~ 8~~ 1600 24~~ ~ 3200 4000 0 800 1600 2400 3200 4000 4800 Vertical Section (ft) Azim = 308.15°, Scale = 1(in):800(ft) Origin = 0 N/-S, 0 E/-V f~E~ Schiumherger ~~~ S-401 (P9) F~E`~ prudhoe Bay Unit - WOA STRUCTURE S-PAD Mag~epcPaamelers s~nau ~~u,m r.nozi ni„kn s~di~ ria~es. zo~~e oo. us Fem u~:~,uM.,~s MoGel BGGM20p5 Dip BOB95' Da~e: JJy30.300fi ]03t iB0]5 NoM~n~ 598U]6950/NS Gn4COnv. M9~96t:6B' SNN -~ ~ NDRnI~ ftWaryTaMe~65S011a0oveMSL~ AlagOec •I<31J' FS~. 5)5931nT Lon Wta92J0a2 Eaxiing 618930.OOIIUS S~'aleFap~.095991606)6 Plan 5-:Jt1~9i SnyOae: AIaUt<.1110fi -3500 -3000 -2500 -2000 -1500 -1000 -500 0 n n n z 0 0 ~ c u a~ m U ~ ~ V V V 2500 2000 1500 ~~~~ 500 0 2500 ~ 2000 1500 ' ~0~~ ~ 500 I 0 -3500 -3000 -2500 -2000 -1500 -1000 -500 0 c« W Scale = 1(in):500(ft) E»> bp Schlumberger S-401 (P9) Proaosal Report Date: March 14, 2006 Survey I DLS Computation Mefhod: Minimum Curvature / lubinski Client: BP Exploration Alaska Vertical Section Azimuth: 308.150° Field: Structure 1 Slot: Prudhoe Bay Unit - WOA S-PAD I S~01 ~~ Vertical Section Origin: ~~ ND Reference Datum: N 0.000 ft, E 0.000 ft Rotary Table Well: Borehole: ~ f~~ Plan S-401 ~~~ Plan S-401 ~~~ ND Reference Elevation: Sea Bed 1 Ground Level Elevation: 65.50 ft relative to MSL 36.50 ft rela6ve to MSL UWVAPI#: 50029 Magnetic Declination: 24.313° Survey Name I Date: S-401 (P9) I Marc~ 14, 2006 ToWI Field Strength: 57593.090 nT Tort I AHD 1 DDI 1 ERD ratio: 100.147° I 4288.14 ft I 5.84011.10~ Magnetic Dip: 80.895° Grid Coordinace System: NAD27 Alaska State Planes, Zone 04, US Feel Declination Date: July 20, 2006 Location LaNLong: N 70.35502092, W 149.03417829 Magnetic Declination Model: BGGM 2005 Location Grid WIE Y/X: N 598Q369.500 ftUS, E 618930.000 ftUS North Reference: True Norltt Grid Convergence Angle: +0.90961468° Total Corr Mag North •> True North: +z4.313° Grid Scale Factor: 0.99991607 Laal Coordinates Referenced To: Well Head ~ Measured Vertical Comments Inclination Azimuth Sub-Sea ND ND NS EW DLS Tool Face Build Rate Walk Rate Northing Easting Latitude Longitude Depth Section ft de de ft ft R ft fl de 100 R de de I100 R de I100 k ftUS ftUS ~~ ~ ~.w ~.w ~vv.vv -o~.ov v.v~ v.v~ u.uu u.vu v.v~ - i ~u.vvm u.~u ~.w oaav3na.~u e i ua.su.uu IV N.SObUZVyZ VV 14y.U341 /S"Ly KOP Bld 1.5/100 250.00 0.00 260.00 184.50 250.00 0.00 0.00 0.00 0.00 -100.OOM 0.00 0.00 5980369.50 618930.00 N 70.35502092 W 149.03417829 300.00 0.75 260.00 234.50 300.00 0.22 -0.06 -0.32 1.50 -100.OOM 1.50 0.00 5980369.44 618929.68 N 70.35502077 W 149.03418091 Bld 2/100 350.00 1.50 260.00 284.49 349.99 0.87 -0.23 -1.29 1.50 -100.OOM 1.50 0.00 5980369.25 618928.71 N 70.35502030 W 149.03418876 400.00 2.50 260.00 334.46 399.96 2.04 -0.53 -3.01 2.00 -100.OOM 2.00 0.00 5980368.92 618927.00 N 70.35501948 W 149.03420271 G1 404.55 2.59 260.00 339.00 404.50 2.17 -0.57 -3.21 2.00 -100.OOM 2.00 0.00 5980368.88 618926.80 N 70.35501938 W 149.03420433 500.00 4.50 260.00 434.27 499.77 6.11 -1.59 -9.02 2.00 -100.OOM 2.00 0.00 5980367.77 618921.01 N 70.35501658 W 149.03425153 Crv 3.75/100 550.00 5.50 260.00 484.07 549.57 9.02 -2.35 -13.31 2.00 51.11G 2.00 0.00 5980366.94 618916.73 N 70.35501451 W 149.03428638 600.00 6.83 272.36 533.79 599.29 13.03 -2.64 -18.64 3.75 38.83G 2.67 24.72 5980366.56 618911.40 N 70.35501371 W 149.03432968 700.00 10.03 285.97 632.70 698.20 25.93 0.00 -32.97 3.75 25.35G 3.20 13.61 5980368.98 618897.04 N 70.35502093 W 149.03444599 800.00 13.52 292.85 730.59 796.09 45.27 6.94 -52.12 3.75 18.61 G 3.48 6.88 5980375.61 618877.78 N 70.35503988 W 149.034 0 900.00 17.11 296.92 827.02 892.52 70.99 18.14 -76.02 3.75 14.69G 3.59 4.07 5980386.43 618853.71 N 70.35507049 W 149.03 1000.00 20.76 299.60 921.60 957.10 102.95 33.56 -104.55 3.75 12.15G 3.65 2.68 5980401.40 618824.93 N 70.35511262 W 149.035 6 1100.00 24.44 301.51 1013.90 1079.40 141.04 53.14 -137.61 3.75 10.39G 3.68 1.91 5980420.44 618791.57 N 70.35516609 W 149.03529569 1200.00 28.14 302.94 1103.55 1169.05 185.09 76.78 -175.05 3.75 9.10G 3.70 1.43 5980443.48 618753.77 N 70.35523067 W 149.03559968 1300.00 31.84 304.07 1190.14 1255.64 234.90 104.39 -216.70 3.75 8.13G 3.71 1.12 5980470.42 618711.68 N 70.35530609 W 149.03593791 1400.00 35.56 304.98 1273.33 1338.83 290.26 135.84 -262.40 3.75 7.37G 3.72 0.91 5980501.15 618665.50 N 70.35539202 W 149.03630896 1500.00 39.28 305.74 1352.73 1418.23 350.94 171.01 -311.94 3.75 6.77G 3.72 0.76 5980535.52 618615.41 N 70.35548809 W 149.03671122 1600.00 43.01 306.38 1428.03 1493.53 416.68 209.74 -365.11 3.75 6.28G 3.73 0.65 5980573.40 618561.64 N 70.35559390 W 149.03714298 1700.00 46.74 306.95 1498.88 1564.38 487.20 251.87 -421.68 3.75 5.88G 3.73 0.56 5980614.63 618504.41 N 70.35570898 W 149.03760239 SV6 1784.38 49.88 307.37 1555.00 1620.50 550.19 289.93 -471.89 3.75 5.60G 3.73 0.50 5980651.88 618453.61 N 70.35581295 W 149.03801010 1800.00 50.47 307.44 1565.00 1630.50 562.18 297.22 -481.42 3.75 5.55G 3.73 0.47 5980659.01 618443.97 N 70.35583286 W 149.03808748 1900.00 54.20 307.89 1626.10 1691.60 641.33 345.59 -544.06 3.75 5.28G 3.73 0.45 5980706.38 618380.57 N 70.35596498 W 149.03859617 WeIlDesign Ver SP 1.0 Bld( doc40x_56 ) S-401\Plan S-401\Pian S-401\S-401 (P9) Generated 3/14/2006 1:55 PM Page 1 of 2 Comments Measured ~nclination Azimuth Sub•Sea TVD ND Vertical NS EW DLS Tool Face Build Rate Walk Rate Northing Easting Latitude Longitude Depth Section ft d de ft ft ft ft ft de H00 ft de de 100 ft de H00 ft ftUS ftUS ZUUU.W b/.`J3 3V23.SU lbi5l.`Jl l/4/.4l /Z4.Z25 S`Jb.// -bU`J.S4 3J0 D.UDU J./J U.41 OyBU/OO.OC 018J14.4y rv iU.JO~iV•+OU vv i•ta.~lo~iLOO~I 2100.00 61.67 308.67 1732.20 1797.70 810.69 450.55 -676.98 3.75 4.86G 3.74 0.37 5980809.21 618246.01 N 70.35625171 W 149.03967558 2200.00 65.41 309.02 1776.75 1842.25 900.19 506.70 -746.69 3.75 4.71 G 3.74 0.35 5980864.24 618175.43 N 70.35640508 W 149.04024168 End Crv 2258.29 67.59 309.22 1799.99 1865.49 953.63 540.42 -788.16 3.75 O.OOG 3.74 0.33 5980897.30 618133.43 N 70.35649719 W 149.04057843 Base Perm 2415.66 67.59 309.22 1860.00 1925.50 1099.09 632.40 -900.87 0.00 O.OOG 0.00 0.00 5980987.47 618019.28 N 70.35674844 W 149.04149381 EOCU 2992.64 67.59 309.22 2080.00 2145.50 1632.39 969.63 -1314.13 0.00 O.OOG 0.00 0.00 5981318.07 617600.76 N 70.35766956 W 149.04485013 SV5 3254.90 67.59 309.22 2180.00 2245.50 1874.80 1122.92 -1501.97 0.00 O.OOG 0.00 0.00 5981468.34 617410.52 N 70.35808823 W 149.04637583 9-5/8" Csg Pt 3700.75 67.59 309.22 2350.00 2415.50 2286.89 1383.51 -1821.31 0.00 O.OOG 0.00 0.00 5981723.81 617087.12 N 70.35879994 W 149.04896967 SV4 3779.43 67.59 309.22 2380.00 2445.50 2359.62 1429.50 -1877.66 0.00 O.OOG 0.00 0.00 5981768.89 617030.05 N 70.35892553 W 149.04942742 Drp 4/100 4717.93 67.59 309.22 2737.85 2803.35 3227.07 1978.03 -2549.85 0.00 180.OOG 0.00 0.00 5982306.64 616349.29 N 70.36042354 W 149.05488805 SV3 4723.55 67.36 309.22 2740.00 2805.50 3232.26 1981.31 -2553.87 4.00 180.OOG -4.00 0.00 5982309.85 616345.22 N 70.36043250 W 149.0~3 4800.00 64.30 309.22 2771.29 2836.79 3301.98 2025.40 -2607.91 4.00 180.OOG -4.00 0.00 5982353.08 616290.50 N 70.36055290 W 149.0 9 4900.00 60.30 309.22 2817.76 2883.26 3390.49 2081.37 -2676.49 4.00 180.OOG -4.00 0.00 5982407.95 616221.04 N 70.36070574 W 149.05591690 5000.00 56.30 309.22 2870.30 2935.80 3475.55 2135.16 -2742.40 4.00 180.OOG -4.00 0.00 5982460.67 616154.29 N 70.36085261 W 149.05645236 5100.00 52.30 309.22 2928.63 2994.13 3556.73 2186.49 -2805.30 4.00 180.OOG -4.00 0.00 5982511.00 616090.58 N 70.36099279 W 149.05696345 SV2 5181.08 49.06 309.22 2980.00 3045.50 3619.43 2226.15 -2853.89 4.00 180.OOG -4.00 0.00 5982549.88 616041.37 N 70.36110107 W 149.05735823 5200.00 48.30 309.22 2992.49 3057.99 3633.64 2235.13 -2864.90 4.00 180.OOG -4.00 0.00 5982558.68 616030.22 N 70.36112561 W 149.05744768 5300.00 44.30 309.22 3061.56 3127.06 3705.92 2280.84 -2920.91 4.00 180.OOG -4.00 0.00 5982603.49 615973.51 N 70.36125041 W 149.05790270 5400.00 40.30 309.22 3135.51 3201.01 3773.20 2323.39 -2973.04 4.00 180.OOG -4.00 0.00 5982645.20 615920.71 N 70.36136659 W 149.05832627 5482.58 37.00 309.22 3199.99 3265.49 3824.76 2356.00 -3013.00 4.00 O.OOG -4.00 0.00 5982677.17 615880.24 N 70.36145563 W 149.05865091 End Drp 5482.59 37.00 309.22 3200.00 3265.50 3824.77 2356.00 -3013.00 0.00 O.OOG 0.00 0.00 5982677.17 615880.24 N 70.36145564 W 149.05865095 SV1 5532.68 37.00 309.22 3240.00 3305.50 3854.90 2375.06 -3036.35 0.00 O.OOG 0.00 0.00 5982695.86 615856.59 N 70.36150768 W 149.05884068 UG4 5970.93 37.00 309.22 3590.00 3655.50 4118.60 2541.82 -3240.68 0.00 O.OOG 0.00 0.00 5982859.34 615649.66 N 70.36196304 W 149.06050091 UG4A 6021.01 37.00 309.22 3630.00 3695.50 4148.74 2560.88 -3264.03 0.00 O.OOG 0.00 0.00 5982878.03 615626.01 N 70.36201508 W 149.06069065 6232.62 37.00 309.22 3799.00 3864.50 4276.07 2641.41 -3362.69 0.00 O.OOG 0.00 0.00 5982956.97 615526.09 N 70.36223494 W 149.06149233 TD / 7" Csg Pt 6233.88 37.00 309.22 3800.00 3865.50 4276.82 2641.88 -3363.28 0.00 O.OOG 0.00 0.00 5982957.44 615525.50 N 70.36223624 W 149.06149707 ~ ~ WeIlDesign Ver SP 1.0 Bld( doc40x_56 ) S-401\Plan S-401\Plan S-401\S-401 (P9) Generated 3/14/2006 1:55 PM Page 2 of 2 ~ ~ BP Alaska Anticollision Report Campany: BP ArnoCO Date: 3/14/2006 ' Time: 14:29:53 Page: Y Field; ' Prudhoe Bay Reference Site: PB S Pad Co-ordinate(Nk) Reference: - Well: Plan S-401, True North Reference Welt: Plart S-401 Vertical (TVD) Reference: 5-401°Plan 65;5 Reference WellpatN: Plan 5-401 Db: Oracle > _ _ - _- - -- i NO GLOBAL SCAN: Using user defined selection & scan criteria - Reference: -- -- - - Principal Plan 8~ PLANNED PROGRAM 'i Interpolation Method: MD + Stations IntervaL• 5.00 ft Error Model: ISCWSA Ellipse ' I Depth Range: 28.50 to 6359.09 ft Scan Method: Trav Cylinder North Maximum Radius:10000.00 ft ~- - -- - - --- -- Error Surface: Ellipse + Casing ' - -- -- _ - _ - -- Survey Program for DefiniNve Wellpath - - _ . - ----- -- - - _ _ - -- Date. 9/13/2004 Validated: No Version: 3 ' Planned From To Survey Toolcode Tool Name ', ft ft ~ ' ~ -- - ---- i 28.50 800.00 ~ ------ -- - ___--- -- Planned: Plan #8 V1 --- - -- - _ GYD-GGSS _ _ __- -__ _ - - Gyrodata gyro singie shots _ . ___ J I 800.00 2200.00 Planned: Plan #8 V1 MWD MWD - Standard I 800.00 6359.09 - -- - -- Planned: Plan #8 V1 -------- - MWD+IFR +MS MWD + IFR + Multi Station ', Casing Points - - -- - - I MD TVD Diameter - Hole Size Name _ - i i ft ft --- -_- ---- in -_, --- in ---- -- , 1 -- - - - , 370074 2415.50 - 9.625 _ - - 16.000 9 5/8" --- __ _ . - - - I ' 6359.09 3965.50 7.000 8.500 7" ' Summary r - - ~ - -- - - <-------' -- Offset Welipath --- , _ _ _ . - -------'----% Reference ~ Ofiset T Ctr-Ctr ~ No-Go _ _. Allowable - ~r , i Site Well Wellpath ` MD MD " Distance Area Deviation Warning ~" ~ ~ - - ---- - -- -- _ _: - ` - ft - --- ft - - - ft - ft' ft ` ' - ' r I PB S Pad - -- -- Plan S-121 . -__ _ . _. - --- __ -- Plan S-121 V4 Plan: PI - -- 419.88 - 420.00 -- - 91.66 8.08 -- 83.58 -- Pass: Major Risk ' ', PB S Pad Plan S-121 Plan S-121 P61 V1 Plan: 419.88 420.00 91.66 8.08 83.58 Pass: Major Risk ', ' PB S Pad Plan S-203 Plan S-203 (East) V3 P 634.97 650.00 992.91 13.18 979J3 Pass: Major Risk ' ', PB S Pad Plan S-203 Plan S-203 (West) V5 P 666.05 695.00 991.07 11.68 979.39 Pass: Major Risk I j PB S Pad Plan S-208 Plan S-208 VO Plan: S- 32571 350.00 1466.27 7.55 1458.72 Pass: Major Risk ' ', PB S Pad Plan S-214 Plan S-214 V1 Plan: S- 1151.93 1155.00 118.07 20.21 97.86 Pass: Major Risk ', PB S Pad S-01A S-01A V1 569.59 565.00 521.40 12.69 508J1 Pass: Major Risk ', I PB S Pad S-01 B S-01 B V1 570.51 570.00 521.44 12.66 50878 Pass: Major Risk '~~ PB S Pad S-01 S-01 V1 630.47 640.00 513.72 15.29 498.43 Pass: Major Risk PB S Pad I S-02AP61 S-02AP61 V1 552.42 555.00 528.71 10.48 518.24 Pass: Major Risk PB S Pad S-02A S-02A V1 552.42 555.00 528.71 10.48 518.24 Pass: Major Risk ~i PB S Pad S-02 S-02 V1 551.45 555.00 528.70 10.46 518.24 Pass: Major Risk ', PB S Pad S-03 S-03 V1 408.23 415.00 559.29 7.52 551.78 Pass: Major Risk ', PB S Pad S-04 S-04 V1 471.50 495.00 604.69 9.29 595.40 Pass: Major Risk ', PB S Pad S-05AP61 S-OSAP61 V1 371.48 385.00 670.76 9.74 661.02 Pass: Major Risk ' PB S Pad S-OSA S-05A V1 371.48 385.00 670.76 9.74 661.02 Pass: Major Risk PB S Pad S-05 S-05 V1 370.26 390.00 670.76 9.73 661.04 Pass: Major Risk PB S Pad S-06 S-06 V1 337.68 350.00 745.47 6.38 739.09 Pass: Major Risk PB S Pad S-07A S-07A V1 366.06 385.00 827.40 7.25 820.15 Pass: Major Risk PB S Pad S-07 S-07 V1 366.06 385.00 827.40 7.25 820.15 Pass: Major Risk ; PB S Pad S-08 S-08 V1 333.69 350.00 917.37 9.04 908.33 Pass: Major Risk PB S Pad S-08 S-08A V2 333.69 350.00 917.37 9.04 908.33 Pass: Major Risk ' PB S Pad S-08 S-08B V3 333.69 350.00 917.37 9.04 908.33 Pass: Major Risk PB S Pad S-09 S-09 V1 332.25 350.00 1011.12 7.21 1003.91 Pass: Major Risk ' PB S Pad S-100 S-100 V10 6355.51 6150.00 306.99 229.69 77.31 Pass: Major Risk ' PB S Pad S-101 S-101 V3 1391.48 1380.00 159.04 29.58 129.45 Pass: Major Risk PB S Pad S-101 S-101 PB1 V9 1391.48 1380.00 159.04 29.63 129.41 Pass: Major Risk ' PB S Pad S-102 S-102 V11 246.29 245.00 287.33 4.90 282.43 Pass: Major Risk , PB S Pad S-102 S-102L1 V5 246.29 245.00 287.33 4.90 282.43 Pass: Major Risk ; PB S Pad S-102 S-102L1 P61 V7 246.29 245.00 287.33 4.85 282.48 Pass: Major Risk ', PB S Pad S-102 S-102PB1 V14 246.29 245.00 287.33 4.90 282.43 Pass: Major Risk ' PB S Pad S-103 S-103 V6 1335.20 1295.00 386.44 26.01 360.43 Pass: Major Risk ' PB S Pad S-104 S-104 V1 338.85 340.00 481.31 6.83 474.48 Pass: Major Risk PB S Pad S-105 S-105 V5 1307.27 1255.00 442.63 24.60 418.04 Pass: Major Risk ', PB S Pad S-106 S-106 V2 5315.59 5175.00 211.05 180.49 30.56 Pass: Major Risk ' PB S Pad S-106 S-106PB1 V12 5315.59 5175.00 211.05 180.66 30.39 Pass: Major Risk PB S Pad S-107 S-107 V36 5745.87 5625.00 528.37 191.72 336.65 Pass: Major Risk PB S Pad S-108 S-108 V6 1161.64 1155.00 348.06 19.86 328.20 Pass: Major Risk PB S Pad S-109 S-109 V8 774.74 770.00 304.47 14.23 290.24 Pass: Major Risk ' PB S Pad S-109 S-109PB1 V2 774.74 770.00 304.47 14.23 290.24 Pass: Major Risk ' PB S Pad S-10AP61 S-10APB1 V1 329.90 350.00 1105.06 6.71 1098.34 Pass: Major Risk i PB S Pad S-10A S-10A V1 325.82 345.00 1104.97 6.59 1098.38 Pass: Major Risk I ~ ~ BP Alaska Anticollision Report - Compa~ry:' ; - BP Amoco _ - Date: 3/14/2006 Time: 14:29:53 -- Page: 2` ~ Field: ' Prudhoe Bay ~ Reference Site: PB S Pad Co-ordinate(NE} Reference: WeIL' Plan S-401, True North Reference Wel(: Plan S-401 Vertical (TVD) Aeierence: S-401: Plan 65;5 Referenee Welipaths Plan S-401 Db: Oraele ; ; ~~ Summary -- - _ _ <- -- - Offset Wellpath - - T --- ~ Reference ptfset __. ._ CtrvCtr NaGo _ „ _ Alluwable ~ _ i Site WeII Welipath MD MD Distance Area Deviation Warning ~ '- - - - ft ft ft ft ft i - ,`- -- - - ' PB S Pad ~ --- - - S-10 _. - -- =- - S-10 V1 _- 329.90 - --- 350.00 --- : 1105.06 - 6.71 --- - 1098.34 -- . -- Pass: Major Risk ' PB S Pad I S-110 S-110 V18 450.88 460.00 312.61 9.69 302.92 Pass: Major Risk ' , PB S Pad S-111 S-111 V10 270.70 270.00 363.25 5.21 358.04 Pass: Major Risk I PB S Pad S-111 S-111 P61 V5 270.70 270.00 363.25 5.21 358.04 Pass: Major Risk I PB S Pad S-111 S-111 PB2 V2 270J0 270.00 363.25 5.21 358.04 Pass: Major Risk ' I PB S Pad S-112 S-112 V20 438.52 445.00 163.71 8.83 154.88 Pass: Major Risk ', I PB S Pad S-113 S-113 V14 2187.34 2105.00 124.50 66.82 57.68 Pass: Major Risk I , PB S Pad S-113 S-113A V3 2187.34 2105.00 124.50 66.67 57.83 Pass: Major Risk I ', PB S Pad S-113 S-113B V6 2187.34 2105.00 124.50 66.67 57.83 Pass: Major Risk , ', PB S Pad S-114 S-114 V13 2365.46 2235.00 140.48 56.14 84.34 Pass: Major Risk ' ' PB S Pad S-114 S-114A V6 2365.46 2235.00 140.48 55.99 84.50 Pass: Major Risk ' PB S Pad S-115 S-115 ST V1 Plan: Plan 1576.14 1575.00 204.41 34.49 169.92 Pass: Major Risk PB S Pad S-115 S-115 V7 1576.15 1575.00 204.44 34.40 170.04 Pass: Major Risk ', PB S Pad S-116 S-116 V6 1063.64 1060.00 96.70 18.89 77.82 Pass: Major Risk ' , PB S Pad S-117 S-117 V4 1164.62 1160.00 189.74 22.77 166.98 Pass: Major Risk ', ', PB S Pad S-118 S-118 V5 454.59 455.00 121.50 7.95 113.54 Pass: Major Risk ', PB S Pad S-119 S-119 V7 2556.32 2310.00 184J2 66.35 118.37 Pass: Major Risk ~ I PB S Pad S-11 S-11 V4 335.92 360.00 1201.05 7.57 1193.48 Pass: Major Risk ', ', PB S Pad S-11 S-11A V1 336.64 360.00 1201.07 7.58 1193.48 Pass: Major Risk ' , PB S Pad S-11 S-11 B V1 337.04 360.00 1201.07 7.59 1193.48 Pass: Major Risk I PB S Pad S-120 S-120 V4 1723.45 1690.00 74.74 41.88 32.86 Pass: Major Risk ; , PB S Pad S-122 S-122 V9 968.07 965.00 212.47 16.39 196.07 Pass: Major Risk ', PB S Pad S-122 S-122PB1 V4 968.07 965.00 212.47 16.39 196.07 Pass: Major Risk ', I I PB S Pad S-123 S-123 V10 210.04 205.00 771.38 6.77 764.62 Pass: Major Risk ', ~, PB S Pad S-12A S-12A V1 294.95 315.00 1295.30 7.70 1287.60 Pass: Major Risk , ', ' PB S Pad S-12 S-12 V1 78.38 80.00 1303.46 2.01 1301.45 Pass: Major Risk ' ' PB S Pad S-13 S-13 V1 286.55 300.00 1405.43 5.90 1399.53 Pass: Major Risk ' ', PB S Pad S-14 S-14 V5 369.81 415.00 1509.88 12.33 1497.55 Pass: Major Risk , PB S Pad S-14 S-14A V3 369.81 415.00 1509.88 12.33 1497.55 Pass: Major Risk I, PB S Pad S-15 S-15 V2 605J9 610.00 871.46 13.84 857.62 Pass: Major Risk , PB S Pad S-16 S-16 V1 617.11 625.00 978.21 10.40 967.82 Pass: Major Risk , ', PB S Pad S-17 S-17 V1 599.13 599.98 1090.02 12.38 1077.65 Pass: Major Risk ', ', PB S Pad S-17 S-17A V1 599.13 599.98 1090.02 12.38 1077.65 Pass: Major Risk ', PB S Pad S-17 S-17AL1 V1 599.13 599.98 1090.02 12.38 1077.65 Pass: Major Risk ', ', PB S Pad S-17 S-17AP61 V1 599.13 599.98 1090.02 12.38 1077.65 Pass: Major Risk ' ~ PB S Pad S-17 S-176 V1 599.13 599.98 1090.02 12.38 1077.65 Pass: Major Risk ' I PB S Pad S-17 S-17C V1 599.13 599.98 1090.02 12.22 1077.80 Pass: Major Risk ~I PB S Pad S-17 S-17CPB1 V2 599.13 599.98 1090.02 12.22 1077.80 Pass: Major Risk ', ' PB S Pad S-17 S-17CP62 V1 599.13 599.98 1090.02 12.22 1077.80 Pass: Major Risk , PB S Pad S-18 S-18 V1 600.00 610.00 1199.67 11.78 1187.89 Pass: Major Risk PB S Pad S-18 S-18A V16 600.00 605.00 1199.64 11.65 1187.99 Pass: Major Risk ', ' PB S Pad S-19 S-19 V1 575.45 585.00 515.95 10.98 504.96 Pass: Major Risk ', ', PB S Pad S-200 Plan S-200A East V3 PI 468J4 470.00 136.50 8.25 128.24 Pass: Major Risk I ', PB S Pad S-200 Plan S-200A West V1 PI 424.44 425.00 135.96 7.47 128.49 Pass: Major Risk , I PB S Pad S-200 S-200 V1 422.39 425.00 135.93 7.33 128.60 Pass: Major Risk ', ' PB S Pad S-200 S-200P81 V10 422.39 425.00 135.93 7.33 128.60 Pass: Major Risk ' ' PB S Pad S-201 S-201 V2 1303.71 1260.00 421.53 24.13 397.40 Pass: Major Risk ', , PB S Pad S-201 S-201 PB1 V11 1303J1 1260.00 421.53 24.13 397.40 Pass: Major Risk ', ' PB S Pad S-20 S-20 V4 554.39 565.00 534.01 10.16 523.85 Pass: Major Risk ' ~ PB S Pad ~ S-20 S-20A V2 554.39 565.00 534.01 10.16 523.85 Pass: Major Risk ', PB S Pad S-213 S-213 V9 941.31 935.00 178.96 14.27 164.69 Pass: Major Risk , I~ PB S Pad S-213 S-213A V22 940.42 930.00 178.95 14.26 164.69 Pass: Major Risk ', PB S Pad S-213 S-213AL1 V9 940.42 930.00 178.95 14.26 164.69 Pass: Major Risk j , PB S Pad S-213 S-213A~1-01 V7 940.42 930.00 178.95 14.26 164.69 Pass: Major Risk ', !' PB S Pad S-213 S-213AL2 V5 940.42 930.00 178.95 14.26 164.69 Pass: Major Risk ' ', PB S Pad S-213 S-213AL3 V7 940.42 930.00 178.95 14.26 164.69 Pass: Major Risk 'I ', PB S Pad S-215 S-215 V9 637.29 660.00 889.94 11.86 878.08 Pass: Major Risk i '~ PB S Pad ~ S-216 S-216 V2 1090.24 1090.00 65.11 19.45 45.67 Pass: Major Risk i PB S Pad I S-21 S-21 V1 437.58 445.00 571.16 8.37 562.79 Pass: Major Risk ' , PB S Pad S-22A S-22A V1 607.81 615.00 514.15 10.64 503.51 Pass: Major Risk I ', PB S Pad S-226 S-226 V2 607.81 615.00 514.15 1079 503.35 Pass: Major Risk I ', PB S Pad S-22 S-22 V1 607.81 615.00 514.15 10.65 503.49 ~ Pass: Major Risk I ' PB S Pad S-23 S-23 V1 456.86 460.00 545.80 8.34 537.46 Pass: Major Risk ! • • BP Alaska Anticollision Report Cornpany: BP Amoco - Date: 3/14/2006 Time: 14:29:53 Page 3 I Fieltl: Prudhoe Bay lteference Site: PB S Pad Co-ordinate(NE) Reference: ' WeIL' Plan S-401, Tru e North i I Reference Well: Plan S-401 Vertical (TVD) Reference: S-401 Pl an 65;5 ! Reference'Wellpath: Plan S-401 I Db: Qracle Summary '`~ <___~~_-------- - Offset Wellpath -- ------> Reference bffset Ctr-Ctr No-Go Allowahle I' ~ Site Wel! ' Wellpath MD MD Distance Area - Deviation Warning I ft ft ft, ~ ft / i __.._ _ - -- PB S Pad -- - ---- ---- S-24 - - - - -- - -- _ _ _ S-24 V5 -- -- 419.96 - --- 430.00 ----- 588.94 ---- 8.17 - - 580.77 - - -- - - Pass: Major Risk ; ', PB S Pad S-24 S-24A V1 422.28 430.00 588.99 8.22 580.77 Pass: Major Risk ~ j PB S Pad S-24 S-246 V2 422.28 430.00 588.99 8.22 580.77 i Pass: Major Risk ' I PB S Pad S-25APB1 S-25APB1 V2 544.90 570.00 624.68 1379 610.89 Pass: Major Risk ~ ', PB S Pad S-25A S-25A V1 366.71 375.00 625.03 6.83 618.20 Pass: Major Risk I I PB S Pad S-25 S-25 V1 366.71 375.00 625.03 6.83 61820 Pass: Major Risk !i I' PB S Pad S-26 S-26 V1 320.11 325.00 647.73 5.67 642.06 Pass: Major Risk !~ ~ PB S Pad S-27 S-27 V1 386.98 400.00 694.59 7.34 687.25 Pass: Major Risk ' ', PB S Pad S-27 S-27A V3 386.98 400.00 694.59 7.19 687.40 Pass: Major Risk ', ' PB S Pad S-27 S-27B V7 386.24 400.00 694.57 7.06 687.51 Pass: Major Risk ', ~ PB S Pad S-28 S-28 V4 336.64 345.00 719.70 6.93 712.77 Pass: Major Risk , ', PB S Pad S-28 S-28A V1 336.64 345.00 719.70 6.93 712.77 Pass: Major Risk ~ ', PB S Pad S-28 S-28B V2 337.73 345.00 719.72 6.95 712.77 Pass: Major Risk ', I '~ PB S Pad S-28 S-28BPB1 V7 337J3 345.00 71972 6.95 712.77 Pass: Major Risk ', I' PB S Pad S-29AL1 S-29AL1 V1 332.59 350.00 946.33 6.85 939.49 Pass: Major Risk ', PB S Pad S-29A Plan S-29AL2 VO Plan: 331 JO 345.00 946.31 6.68 939.63 Pass: Major Risk ' p6 S Pad S-29A S-29A V1 332.59 350.00 946.33 6.85 939.49 Pass: Major Risk ~ PB S Pad S-29 Plan S-296 V1 Plan: S- 331.70 345.00 946.31 6.78 939.53 Pass: Major Risk ~! PB S Pad S-29 S-29 V1 332.59 350.00 946.33 6.85 939.49 Pass: Major Risk , PB S Pad S-30 S-30 V1 313.27 320.00 800.85 6.02 794.83 Pass: Major Risk i ' PB S Pad S-31A S-31A V3 336.08 350.00 855.17 6.30 848.87 Pass: Major Risk ~, ', PB S Pad S-31 S-31 V1 336.08 350.00 855.17 6.30 848.87 Pass: Major Risk ~, ' PB S Pad S-32 S-32 V1 300.13 310.00 1070.85 7.54 1063.31 Pass: Major Risk !, PB S Pad S-33 S-33 V1 311.65 325.00 885.10 5.58 879.52 Pass: Major Risk !, ' PB S Pad S-34 S-34 V1 294.60 310.00 1138.54 5.32 1133.21 Pass: Major Risk I PB S Pad S-35 S-35 V1 300.42 315.00 1170.50 5.29 1165.20 Pass: Major Risk '~ ', PB S Pad S-36 S-36 V1 282.62 295.00 1234.49 5.04 1229.45 Pass: Major Risk I ', PB S Pad S-37 S-37 V1 298.13 315.00 1264.72 5.26 1259.46 Pass: Major Risk ', ~, PB S Pad S-38 S-38 V1 309.42 325.00 1039.41 5.39 1034.02 Pass: Major Risk ' I PB S Pad S-400 S-400 V4 526J1 525.00 42.43 925 33.18 Pass: Major Risk ' ~ PB S Pad S-40A S-40A V1 609.13 615.00 1122.94 9.65 1113.29 Pass: Majo~ Risk ' ', PB S Pad S-40 S-40 V1 609.13 615.00 1122.94 9.65 1113.29 Pass: Major Risk ' PB S Pad S-41 L1 S-41 L1 V1 432.69 440.00 14.32 7.12 7.20 Pass: Major Risk ', PB S Pad S-41 P61 S-41 P61 V1 432.69 440.00 14.32 7.12 7.20 Pass: Major Risk ', PB S Pad S-41 S-41 V1 432.69 440.00 14.32 7.12 7.20 Pass: Major Risk ~, ' PB S Pad S-42PB1 S-42P61 V1 657.21 665.00 18.75 11.82 6.94 Pass: Major Risk I PB S Pad S-42 S-42 V2 657.21 665.00 18.75 11.82 6.94 Pass: Maior Risk j PB S Pad S-43L1 S-43L1 V2 352.16 355.00 47.67 6.44 41.23 Pass: Major Risk ~i PB S Pad S-43 S-43 V3 352.16 355.00 47.67 6.44 41.23 Pass: Major Risk PB S Pad S-44L1 PB1 S-44L1 PB1 V3 413.46 415.00 77.28 6.82 70.45 Pass: Major Risk I PB S Pad S-44~1 S-44L1 V5 413.46 415.00 77.28 6.82 70.45 Pass: Major Risk , ' PB S Pad S-44 S-44 V10 413.46 415.00 77.28 6.82 70.45 Pass: Major Risk ' ~ _ _ __- • __ ' Field: Prudhoe Bay I, ' Site: PB S Pad '~ Well: Plan 5-401 ' ' Wellpath: Plan 5-401 ioo -o I ioo Tmvelling Cylinder Azimuth (TFO+AZf) [deg~ vs Centre to CeMre Sepnrntion [I OOR/in] _ ___ __~ __..., 0 0 ~ z I EXISTING PIT I TANK s-~oa~ ~ s-ias ~ ~~ S-114i ~ 5-106 ~ S-201 ~ ` S-103 ~ 5-107 ~ ' S-1'3 ~ s-i~i ~ ', S-108 ~ S-1?9 ~ S-1 i0i ~ _< s-io~ ^ s-~o2 ~ ~ s-,oo ^ s-~o~ ~ s-~~s ~ s-,z2 ~ s-, ~~ ~ s-~2o ^ s-z~s ^ S-11Li ^ ~ S-216 ~ S-ZOG ~ J-44 5-43 ~ j-d2 S-401 27 26 25 n S PAD J I L] -N- 34 `-' 35 ~6 ~a PROJEC ~Q~~`~ A R E A ~o T.12N. 3 T.11 N. 2 VICINITY MAP N.T.S. ~P~~° ~F AC°~s,~ ~~049 T" ~ o~~ ~~, ~o ~Richard F. Allison oe ~ff ~~ ° 10608 ~°~-' F,~aoaooo o ° 5 p~ESS I ONP~ ~~ SURVEYOR'S CERTIFICATE I HEREBY CERTIFY THAT I AM PROPERLY REGISTERED AND LICENSED TO PRACTICE LAND SURVEYING IN THE STATE OF ALASKA AND THAT THIS PLAT REPRESENTS A SURVEY MADE BY ME OR UNDER MY DIRECT SUPERVISION AND THAT ALL DIMENSIONS AND OTHER DETAILS ARE CORRECT AS OF JULY 10, 2005. s-4i NOTES: S-4OO ~- 1. DATE 0~ SURVEYS: JULY 8-10, 2005. 2. REFE'~ENCE ~I~LD BOOK: W005-10 (PGS 3i-43). S-BOOSTER '~' 3. COORDINATES ARE A~ASKA STATE PLAN;., ZONE-4 NAD 27. 4. GFODETtC COORDWAT~S ARE NAD-27. 5. MPU S-PAD AVERAGE SCALE FACTOR IS: 0.9999165. S~PAD ~~~~ 6. HORIZONTAL CONTROL IS BAS-D ON S-PAD MONU~tENTS S-1, S-3 AND S-4. 7. VERTICAL CONTRO_ IS BASED ON MON. S-4. ELEVAT~ONS ARE BP EXPLORATiON MEAN SEA L~VtL DATUM. I OCATED WITHIN PRn?RAC IF~ SEC. :35. T. 1~ N.. R. 1~ F.. UMIAT MFRI~IAN. AI ASKA WELL A.S.P. PLAN': GEODETIC GEODETIC CELLAR SEC ~ION N0. COORDINATES COORDINATES POSITION(DMS) POSITION(D.DD) [30X ELEV. OFFSETS S 4 Y-5,98C,325.14 N 101G.07 70° 21'17.639" 70.3548997° 35 9 4,122' FSL - G0 X- 618,930.1C E 529.84 149° 02'03.059" 149.0341831° ~ 4,504' FEL Y-5,98C,370.2C N 1010.7_5 70° 21'18.C82_" 70.355G2?_8° 36 1 4,167' FSL S-401 X- 618,930.26 E 484J7 149° 02'03.034" 149.C341761° ~ 4,5C3' FEL Y-5,98C,295.23 N 1010.G5 70° 21'17.345' 70.3548181° 36 ~~ 4,092' FSL S-BOOSTER X= 618,930.GG E 559J5 149° 02'03.074" 149.0341872° 4,505' FEL 51 1 17/37/O6 I CHANGE GROUND EIEV. b CELLM BOX ELEV. I KVrtfl LOH I _ ~ _ PLANT LEGEND ~ AS-BUILT CONDUCTaR ~ EXISTING WELL ~^ t ALLISON O i p~ onre: U 7/13I05 o~W~~ FRBOS WOS 07-01 ~ ~~~~o ~a ~: $G1LE: 1 = 100' bp WOA S-PAD AS-BUILT CONDUCTORS WELLS S-400, S-401 & S-BOOSTER SHEET: ~ ~ ~ Tree: CIW 7" 5M Welihead: FMC Big Bore 20" 131.45 ppf, X-56 I 105` Orig. DF elev. = 64.4' Orig. Cellar elev. = 35.9' HES Symphony gauge w/ESP cable 3200 NOTE: 7" Tubing ioenix Auto Y-Tool ~ 7", 26 #/ ft., L-80 Mod Btrc. 25" OD, 2.992" ID ~ntrilift 48 stage HC27000 5 ESP, 6.75" OD,` ~ ~ntrilift HST346 EHL PFS al section ~ ~ntrilift Series,HMIHE ~ 00 hp 7.25" OD motor I 60v./154amp, entrilift PumpMate 3300` 13 3/8 68 ppf, L-80 BTCm 3400` RA Tag 3490` 7" Hanger/Packer 3600' 9 5/8" 40 ppf, L-80 BTCm 3700` 7" csg. shoe 8 1/2" Driller's TD 3-1/2" WLEG, 2.813" ID 3350` i i ~ ~ ss top MD i i 7" liner hanger, topblank 3,600 ' SV4 ESS(contingent) 2370 3,752 ~ EZI (if SV4 ess) 2435 3,922 SV432 blank 2480 4,040 ~ ~ EZI ~ ~ 3200 5,482 SV1 ESS 3230 5,520 SV1 blank 3305 5,613 EZI(contingent) 3630 6,020 ' ' UG4A ESS 3654 6,050 i i UG4A blank(if nec) 3760 6,183 ; ; EZI(contingent) 3760 6,183 ' ' UG4A ESS 3800 6,233 6220' ; ~ UG4A blank 3812 6,248 6234` ~ 1 DATE REV. BY COMMENTS 5/10/06 PGS Proposed ESS completion (WP-09) S-Pad Well S-401 WSW API NO: 50-~cx-xxxxx S-401 . : T~RRIE L kIUBB~E BP EXPL~I~QTION ~K tNC ~~Mastercard Check" PO BOX 196"612= MB 7=5 ANCHORA~E, AK 99519-6612 ., ., „ .. FAY TO 7HE ORDER OF r'l ~. ~~ First Nationai Bank Alaska - ` Anchorage, AK 99501 MEMO `-~~ ~~~ U 89-6/1252 274' DATE -~~a~ ~ I~~,~ DOLLARS ~ ~ ~: L 2 5 2 0 0 0 6 0~: 9 9 L 4~~~ 6 2 2 7~~~ L 5 5 6~~' 0 2 7 4 : ~ ~ TRANSMITTAL LETTER CHECKLIST WELL NAME p~j ~~ `S" ~O j PTn# 2U~- C~ 7 Development i~ Service Exploratory Stratigraphic Test Non-Conventional Well Circle Appropriate Letter / Paragraphs to be Included in Transmittal Letter CHECK ADD-ONS TEXT FOR APPROVAL LETTER WHAT (OPTIONS) ' APPLIES MULTI LATERAL The permit is for a new wellbore segment of existing we l l (If last two digits in permit No. API No 50- - API number are , . between 60-69) I Production should continue to be reported as a function of the original API number stated above. PILOT HOLE In accordance with 20 AAC 25.005(~, all records, data and logs . acquired for the pilot hole must be clearly differentiated in both well name ( PH} and API number (50- - -_) from records, data and logs acquired for well SPACING The permit is approved subject to full compliance with 20 AAC EXCEPTION 25.055. Approval to perforate and produce / inject is contingent i ~ upon issuance of a conservation order approving a spacing exception. assumes the liability of any protest to the spacing exception that may occur. ~ DRY DITCH All dry ditch samp(e sets submitted to the Commission must be in ~ SAMPLE no greater than 30' sample intervals from below the permafrost or ' from where samples are first caught and 10' sample intervals through target zones. Please note the following special condition of this permit: Non-Conventional production or production testing of coal bed methane is not allowed Well for (name of well~ until after (Company Name) has designed and implemented a water wel( testing program to provide baseline data on water quality and quantity. (Company Name) must contact the Commission to obtain advance approval of such water wel( testing rogram. Rev: 1 /2~/06 C:\j ody\transmittai_checkl ist ~ j~~~~~~ ~- 'Field & Pool PRUDHOE BAY, UGNU UNDEF WTRSP -64017 __ ,~i~ ,' . . , ~ ~'~"~"~•° a ~ =~ Well Name: PRUDHOE BAY_UN_UGN S-4_01_. __ _Pro ram SER_______ ______ Well bore se ~j 9 9 ~ P_LORATION_(ALASKA~INC Initial ClasslType PTD#: 2060780 Company BP EX ..-- ~ - _ -- -,_ ~a _ ~..~-. ~ SER / PEN4 GeoArea Unit ONOff Shore On Annular Disposal ^ _ - - - Administration . 11 ~ ~~ ~ Pe[mit_fee attached Yes _ , . . . I2 Lease number appropriate . . .. Yes . ,3 Unique well name and number _ Yes . ~4 Well located in a defined pool _ . No_ This is a water source well, producing low salinity water far enhanced oil recovery. ~5 Welljocated proper distance from_ drilling unit_boundary Yes _ operafiqns, .. ,6 Well located proper distance from other wells . . Yes ;7 Sufficient acreage ayailable in.drilling unit _ . . . . Yes _ _ _ . ,8 If deviated, is. welibore plat_included Yes _ ~9 Operatot only affected party . . Yes . . . ~,10 Operator has appropriake_bond in force _. YeS . . . ~I11 Pe[m~_can be issued without conservation order_ __. Yes _ _ '12 Permit can be issued without administrative approyal _ _ _ . _ _ . Yes _ . . . . . Appr Date ,13 Can permit be approved before 15-day.wait_ _ . . Yes . RPC 6/1/2006 '14 Well located within area and strata authorized by. Injection 0[der #(put 10# in comments)_(For_ NA '15 All wells within 1!4_mile area of [eview identified (For seruice wel_I only) __. NA_ _ ' 16 Pre-produced injector_ durakion of pre-p[oduction less than_ 3 months_(For service well_ only) __ NA . . ,17 Nonconven. gas conforms to AS31,05.030Q,1.A),(j,2.A-D~ _ _ _ _ _ NA _ _ 18 - ----- Conductor string pravided . - Yes - _ __ _ _ _ _ . 20" @ 105'. _ ___ _ Engineering ',19 Surface casing.protects all.known USDWs . Yes _ ,20 CMT v~l_ adequ_ate to circulate on conductor & surf_csg . Yes _ Adequate excess, '2,21 CMT vol atlequate to kie-in long siring to su _rf csg_ ._ . . . Yes .. . '22 CMT_will cover all known productive horizons . No Expandable screens. . ,23 Casing designs adeguate f_or C, T, B&_permafrost . Yes _ . ,24 Adequake tankage or reserye pit . . Yes Nabors 7ES. ~,25 If a re-drill, has a 10-403 fo_r abandonment been approved _ NA New well, . . ~26 Adequate wellbore separation proposed- . . Yes . '27 If diverter required, tloes it meet regulations . . .. Yes 28 Drdling fluid. proqram Schemaiic & equip list adequate _ Yes Max MW 9.5 ppg, . .. Appr Date ',29 60PEs, do they meet regulation _ . Yes _ . WGA 6I212006 ',30 BOPE,press ratinq appropriate; tesi to_(put psig in comments)_ ._____ Yes _ __. Test to 3500_ psi. . MSP 1270 psi. __ . . !31 Choke.manifold complies_wlAPl_RP-53 (May 84)- - - - - - - - - - - - - - - - - - - - - - - - Yes - - - - - . . . _ . . . . ~,32 Work will occur without operation shuMown_ _ . _ - - - - - - - - - - - - - Yes - _ . . . . . _ ',33 Is presence of H2S gas probable_ . . . Yes . Designated H2$ pad, . . . . .. ~~34 Mechanical condition of wells within AOR yerified GFor.service well on1yJ _ _ _ _ _ _ _ _ . _ . . Yes _ _ _ _ _ No wells within AOR,_ - -- - 35 __ - -- -- -- Permit can be issued w!o hydrogen sulfide measures --- Yes _ ___ __ _____ - _ __ __ _- ---- -- . .. . Geology ,36 Datapresented on potential overpressu[e zones . _ _ . . - _ _ - NA_ ~ii37 Seismic analysis of shallow gas zones- - - - - - . N?- - - - - - . _ _ . . . . Appr Date !~38 Seabed condition suryey (if off-shore) - NA . . ',39 Contact namelphone fot weekly_progress repoRs [exploratory only] _ _ _ NA. _ . _ _ . ~ ~ Geologic Engineering ~Publ' Commissioner: Date: Commissioner: Date m Date ~~~~ ~~ ~~~~ ~~